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Climate Change and Global Warming | Blog Action Day

Thursday, October 15, 2009 View Comments

Global warming is not only happening but it is also accelerating at an alarming rate. Its impact will increase both in frequency and severity. The latest assessment report released by the UN top body on Climate Change presented stronger evidence that most of the warming observed in the last 50 years is from global emissions of greenhouse gases which are rising due to human activities. The report concluded that dramatic changes are already visible and the world needs to use different energy sources than we use today within a few decades to limit centuries of rising temperatures and seas driven by the buildup of heat-trapping emissions in the atmosphere.

The whole world is facing the challenge of climate change, and it is not only an environmental issue. It is a complex issue of sustainable development, which arises mainly due to unsustainable energy production and consumption.

Solutions to address climate change issues can serve as a tool for addressing many other sustainable development concerns. One of the key sectors in terms of mitigation is the energy supply sector. More than two thirds of global greenhouse gas emissions come from this sector and the way in which future energy needs are met will determine whether the efforts to address climate change will remain manageable.

What is climate change and why should we be concerned about it?

What is climate change?

The Earth's climate has always varied, so the term climate change is now generally used to describe the changes caused by human activity - specifically, greenhouse emissions such as carbon dioxide and methane, which build up in the atmosphere and trap heat.

Is it the same as global warming?

As human activity increases the concentration of these gases in the atmosphere far beyond their natural levels, much more heat is trapped. Hence, the term climate change is often used interchangeably with global warming.

Can it be explained by natural causes?

Measurements at the Earth's surface show that average temperatures have risen by some 0.4C since the 1970s. Scientists are confident this change can be blamed on human emissions because the increase is too big to be explained by natural causes.

Although natural factors such as changes in the sun and large volcanic eruptions are known to have warmed and cooled the planet in the past, these effects are not powerful enough to explain the rapid warming seen recently. Only an increased greenhouse effect caused by higher amounts of heat-trapping gases in the atmosphere can explain it.

What is the main greenhouse gas?

Water vapour in the atmosphere produces the strongest greenhouse effect, but it has been in balance for millions of years. Human emissions, though relatively small, tip that balance.

Carbon dioxide is the chief greenhouse gas produced by human activity. It is produced when we burn fossil fuels: oil, gas and coal. The level of carbon dioxide in the atmosphere is measured in parts per million (ppm).

Before the industrial revolution, the carbon dioxide level was about 280ppm. It is now 386ppm and rising by 2-3ppm each year. When other greenhouse gases such as methane are included, the total level in the atmosphere, known as the carbon dioxide equivalent, is closer to 440ppm.

What future temperature rise is expected?

Scientists say continued emissions will cause the planet to heat up further. To work out how much, they use computer models based on the programs used to predict the weather.

These models are not perfect, and struggle to simulate some features of the climate system such as clouds. To get around this, the scientists run many different versions and pool the results. The computer models predict that if emissions continue to rise at the present rate, average temperatures will most likely increase by 4C by 2100.

There are uncertainties, though - for example, the planet's oceans, forests and soils could release their massive stocks of carbon as the world warms, leading to much greater temperature rises than human emissions alone would cause.

Why are warmer temperatures bad?

Most plants and animals have evolved to live in a fairly narrow ecological niche. Some will move to find their desired conditions, others will be able to adapt. Those that cannot move or adapt will perish. Some animals, such as the polar bear, have nowhere to move to.

A warmer climate will affect agriculture and water availability. Increased temperatures are also expected to limit rainfall in some regions and bring more extreme weather events such as storms to others.

Sea levels will rise - gradually at first as the extra warmth works its way into the oceans and makes them expand; more quickly if the gigantic ice sheets in Greenland and west Antarctica start to break up.

How can we tackle global warming?

Scientists say the only realistic way at present is to reduce greenhouse gas emissions. How to do that - and where - is a political hot potato.

Because it takes time for the heat to build up in the atmosphere, and because carbon dioxide stays in the atmosphere for a long time, there is a lag in the system, which means the effect of any changes will not be felt for decades. Put bluntly, we are headed for about another 0.5C of warming whatever we do.

What are the Kyoto protocol and the Copenhagen climate talks?

The world's only existing treaty to limit emissions, the Kyoto protocol, has had limited success, and expires in 2012. Politicians are working to develop a replacement that would include countries excluded from Kyoto, such as China, and those that refused to join, such as the US.

From December 7, environment ministers and officials will meet in Copenhagen to thrash out a successor to Kyoto. The two week event is being seen by many environmentalists as a crucial diplomatic opportunity to create an international agreement on meaningful cuts in emissions that will prevent the worst consequences of climate change.

Can renewable energy help?

The United Nations Intergovernmental Panel on Climate Change has said that we already have most of the technology we need to bring down emissions significantly. These include renewable energy sources such as windmills, geothermal and solar panels, as well as more efficient cars and power stations.

What about storing the CO2 underground or blocking the sun?

One technology that would allow us to continue burning fossil fuels such as coal and oil without increasing CO2 levels in the atmosphere is carbon capture and storage (CCS). This involves extracting CO2 at power stations then pumping it underground. Critics argue the technology will prove expensive and is several years away from being proven.

A more drastic approach is so-called geo-engineering. These are major technological fixes such as seeding clouds to bounce some of the sun's radiation back into space or stimulating the growth of algae in the oceans to soak up CO2
These are much more speculative, but Barack Obama's scientific adviser, John Holdren, has said that he is open to even these drastic measures.

Some explanation on Global Warming from Wikipedia

From Wikipedia,

Global warming is the increase in the average temperature of the Earth's near-surface air and oceans since the mid-20th century and its projected continuation. Global surface temperature increased 0.74 ± 0.18 °C (1.33 ± 0.32 °F) during the last century.[1][A] The Intergovernmental Panel on Climate Change (IPCC) concludes that most of the observed temperature increase since the middle of the 20th century is caused by increasing concentrations of greenhouse gases resulting from human activity such as fossil fuel burning and deforestation.[1] The IPCC also concludes that variations in natural phenomena such as solar radiation and volcanoes produced most of the warming from pre-industrial times to 1950 and had a small cooling effect afterward.[2][3] These basic conclusions have been endorsed by more than 40 scientific societies and academies of science,[B] including all of the national academies of science of the major industrialized countries.[4] A small number of scientists dispute the consensus view.
Climate model projections summarized in the latest IPCC report indicate that the global surface temperature will probably rise a further 1.1 to 6.4 °C (2.0 to 11.5 °F) during the twenty-first century.[1] The uncertainty in this estimate arises from the use of models with differing sensitivity to greenhouse gas concentrations and the use of differing estimates of future greenhouse gas emissions. Some other uncertainties include how warming and related changes will vary from region to region around the globe. Most studies focus on the period up to the year 2100. However, warming is expected to continue beyond 2100 even if emissions stop, because of the large heat capacity of the oceans and the long lifetime of carbon dioxide in the atmosphere.[5][6]
An increase in global temperature will cause sea levels to rise and will change the amount and pattern of precipitation, probably including expansion of subtropical deserts.[7] The continuing retreat of glaciers, permafrost and sea ice is expected, with warming being strongest in the Arctic. Other likely effects include increases in the intensity of extreme weather events, species extinctions, and changes in agricultural yields.
Political and public debate continues regarding climate change, and what actions (if any) to take in response. The available options are mitigation to reduce further emissions; adaptation to reduce the damage caused by warming; and, more speculatively, geoengineering to reverse global warming. Most national governments have signed and ratified the Kyoto Protocol aimed at reducing greenhouse gas emissions.

Greenhouse gases

 The greenhouse effect is the process by which absorption and emission of infrared radiation by gases in the atmosphere warm a planet's lower atmosphere and surface. It was discovered by Joseph Fourier in 1824 and was first investigated quantitatively by Svante Arrhenius in 1896.[19] Existence of the greenhouse effect as such is not disputed, even by those who do not agree that the recent temperature increase is attributable to human activity. The question is instead how the strength of the greenhouse effect changes when human activity increases the concentrations of greenhouse gases in the atmosphere.
Naturally occurring greenhouse gases have a mean warming effect of about 33 °C (59 °F).[20][C] The major greenhouse gases are water vapor, which causes about 36–70 percent of the greenhouse effect; carbon dioxide (CO2), which causes 9–26 percent; methane (CH4), which causes 4–9 percent[not in citation given]; and ozone (O3), which causes 3–7 percent.[21][22] Clouds also affect the radiation balance, but they are composed of liquid water or ice and so are considered separately from water vapor and other gases.
Human activity since the Industrial Revolution has increased the amount of greenhouse gases in the atmosphere, leading to increased radiative forcing from CO2, methane, tropospheric ozone, CFCs and nitrous oxide. The concentrations of CO2 and methane have increased by 36% and 148% respectively since the mid-1700s.[23] These levels are much higher than at any time during the last 650,000 years, the period for which reliable data has been extracted from ice cores.[24] Less direct geological evidence indicates that CO2 values this high were last seen about 20 million years ago.[25] Fossil fuel burning has produced about three-quarters of the increase in CO2 from human activity over the past 20 years. Most of the rest is due to land-use change, particularly deforestation.[26]
CO2 concentrations are continuing to rise due to burning of fossil fuels and land-use change. The future rate of rise will depend on uncertain economic, sociological, technological, and natural developments. Accordingly, the IPCC Special Report on Emissions Scenarios gives a wide range of future CO2 scenarios, ranging from 541 to 970 ppm by the year 2100.[27] Fossil fuel reserves are sufficient to reach these levels and continue emissions past 2100 if coal, tar sands or methane clathrates are extensively exploited.[28]
The destruction of stratospheric ozone by chlorofluorocarbons is sometimes mentioned in relation to global warming. Although there are a few areas of linkage, the relationship between the two is not strong. Reduction of stratospheric ozone has a cooling influence, but substantial ozone depletion did not occur until the late 1970s.[29] Tropospheric ozone contributes to surface warming.[30]

More information concerning Global Warming at WIKIPEDIA.

My post is dedicated to " Blog Action Day " ( 15/10/2009 ) concerning climate change around the world.

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5 Sites To Learn How To Repair Your Own Computer

Sunday, October 11, 2009 View Comments

Have you ever had a problem with your own computer and gotten a quote from one of those box stores?  Holy cow ! I know a guy who got a virus, took his tower (PC) to a store and paid several hundred rupees to have them install an anti-virus program and “save the day.” ! I am serious, several hundred rupees!  OK, I understand that a laborer is worthy of his hire, but I believe that every single one of us would jump on the chance to save a few bucks if we could.

If there was any possibility to do some of those PC repairs on your own, and therefore save a few rupees, is that something you’d learn how to do? Here are five links that will help you with those computer repair jobs. 

(1) Fixing My Computer… 100% free step-by-step guide

If you can get by the pink, blue, and green pastel colors, this site can be a real great resource in you journey to Do It Yourself computer repair proficiency. Once you arrive at this site, you’ll easily find, along the left hand side, a nifty menu system obviously designed to look like a file explorer.  On that menu you’ll find categories for almost any kind of fix you can think of.  Check out a few of them and see if a problem you are having is covered.

(2) Yahoo Answers Community – Computers & Internet

I know, there are many communities out there on the internet that are ready and willing to give answers to your questions for nothing more than a few kudos.  Yahoo Answers is just one of the communities that I’ve had the most luck with.  For some tips on computer problems you are having, ask the community over in the Computers &  Internet section and you’re sure to find some answers!  Do what I do.  Begin by searching through the many questions already answered.  Odds are someone else had the same, or similar, problem that you are having so avoid the fuss of re-asking the same question.

(3) – 11 Ways to Fix Your Laptop

To pinpoint the most common problems, we picked the brains of senior technical-support officials at Alienware, Dell, Lenovo, Acer and Toshiba. And we’ve provided solutions for getting your laptop back up and running with minimal effort.

You can go through each one of the 11 pages or you can use the little dropdown menu at the bottom of each page to jump the the topic you need.  This article covers topics such as overheating, battery problems, network issues, and virus or spyware infestation, which i think is your problem.  Like I said, the basics are covered here. They’re not exhaustive, but a really good start !

(4) Lifehacker’s Top 10 Computer Hardware Fixes and Upgrades

Some of us will never get to the point where we will be wanting to build a PC from scratch, like number 1 on LifeHacker’s top 10 list of computer hardware fixes and upgrades, but some of these fixes or upgrades are easy enough for most of us.  I’ve used my own good opinion to rate the number one’s on this list: Easiest fix on the list?  Changing or upgrading RAM on a laptop (unscrew a few screws and that’s about it); Most creative? Using elastic strips to quiet a noisy hard drive; Most difficult or involved?  Starting from scratch on your own PC.  Good list and a great help.

(5) – Computer category

This site is more of an answers community.  It seems pretty exhaustive in the computers category.  The site is fairly easy to use – if you notice, the white speech balloons mean that there is no answer yet and a green speech balloon means there is an answer.  Browse around and see if you can find an answer to your question.  If not, it seems that there is a section that allows you to ask a question.  Check out this post (because I think its funny): i wanna go on bebo but i cant in skwl?.

I already learned a new trick from the site: My computer screen as turned upside down how do i turn it back?. Check it out and see what you can learn!

Answer: Press Control + Alt + Up...that should fix it if not go to your desktop left click -->Graphics Properties and turn it right side up :)

As a word of warning, there are obviously some repairs that not every person is capable of accomplishing on their own.  If you are over your head, and you KNOW it, seek help, probably even professional help.  The purpose of this post is to save you some dough on some things that you ARE capable of doing, once you know how.

Do you know of any other online sources that help with  pc repair?  Feel free to share in the comments ! :)

 Source: Make Use Of

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Transformers 3 Confirmed for 2011

Sunday, October 4, 2009 View Comments

Good News Transformers Fans, Michael Bay, the director of Transformers said that, this Thursday that he will shoot a third "Transformers" film, whose release date has been brought forward by exactly one year to July 1, 2011. LOL !

Our Stars, Shia LaBeouf and Megan Fox are slated to return to the Paramount/DreamWorks project, as is Ehren Kruger, the co-writer of this year's hit sequel "Transformers: Revenge of the Fallen." The first two films have grossed more than $1.5 billion worldwide. :$

Bay wrote on his Web site that he met with George Lucas' ILM effects house in San Francisco Thursday morning, and then flew with Kruger to talk new characters with Hasbro executives in Rhode Island."Well, it's official: We have a great 'Transformers 3' story," Bay said on his Web site. "Today is Day One."
Paramount's summer 2011 is shaping up to have four tentpoles: Marvel features "Thor" and "First Avenger: Captain America" bow May 20 and July 22, respectively. And the DreamWorks Animation sequel "Kung Fu Panda: The Kaboom of Doom" hits theaters June 3.

(Editing by DGoodman at Reuters)

From, abc News Entertainment

We hope this time that we enjoy more action, experience new effects, bigger giant toys, better, longer & have more explosions... No word on whether Shia LeBeouf and his molester’s goatee will make an appearance, but if you’ve been sorely lacking an actor screaming, “NO!” and running repeatedly I’d imagine you’ll soon be in robot heaven. Like he went to, In T2 and the return of the Decepticons who was left to be exterminated in Transformers Revenge of the Fallen ! : )

I’d imagine Transformers 3 will not do as much business as the second movie, because once you get punched in the face once, generally you duck. Also, there’s no way we will all be as enthusiastic to see Megan Fox after two more years of ridiculous shiz flying out of her mouth. Unless you’re the next step. And a better man than I. LOL : ))

See you @ Cannon on the 1st of July 2011 ! :p

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Nokia Creates Vibrating Braille Solution

Saturday, October 3, 2009 View Comments

Nokia has developed a  new possible solution for anyone who cannot read text on a mobile phone screen, that is blind people. This was done by implementing a new system of reading braille on a touchscreen handset. The Nokia Braille Reader, still in beta version, utilizes the Braille alphabet while leveraging tactile feedback in mobile phones.

This advance  technology is a product of a joint venture, between Nokia, Tampere University and the Finnish Federation of the Visually Impaired. The Nokia Braille Reader was encoraged by a Canadian Radio-television and Telecommunications Commission (CRTC) mandate of wireless organizations to provide at least one device that supports the needs of blind or people with cognitive or mobility disabilities.

According to Nokia Company, the technology is compatible with its S60 handsets, including the Nokia 5800 XpressMusic :) , Nokia N97, Nokia N97 mini, Nokia 5530, Nokia 5230 and Nokia X6.[1]

The mobile phone as a communication tool is pretty universal when it comes to voice calls, but phones are just as popular for sending text messages as they are for chatting with each other. That is a problem for one set of users who are either partially sighted or completely blind. Nokia has now come up with a possible solution for anyone who cannot read text on a screen by implementing a new system of reading braille on a touchscreen phone.

The Nokia Braille Reader Application (NBRA) has been developed at Nokia Beta Labs. Each text message is fed into the NBRA and the characters converted into braille. Then each character is read out to the user using the vibrating facility of the phone. As braille is a series of raised dots each character can be communicated by changing the vibration to depict raised or not with a whole sequence allowing the user to figure out which character it is. After a short time of using NBRA it should become easy for the user to understand quickly what the characters are based on the vibrations being emitted.
Playback of the text message is only done when a finger is touching the screen which allows the user to pause at any time by lifting their finger off the screen. Large buttons have also been placed in set areas on the screen for different functionality like entering and exiting NBRA; making it easier for the user to navigate to and from the app. Best of all it is totally free to download and use and is compatible with phones based on S60 5th edition such as the N97, N97 mini, 5800 XpressMusic, 5530, 5230, and X6 handsets.

Matthew’s Opinion
There are already solutions for the blind that allow text messages to be read out, but that is not always going to be ideal. Maybe the text message contains information you would rather not share with those around you, and it’s not always possible to wear headphones tolisten to messages. Nokia’s solution is very discreet as it is completely silent.
The one drawback of such a system is how much of a battery drain it may be. Vibrating the phone a lot is going to sap your battery quite quickly, but I don’t know how it compares to reading out texts in terms of which one uses more juice. I’m sure you are still going to get a day’s use out of your Nokia handset though, even if you are texting a lot.
I also wonder if the system could be reversed allowing users to write texts using this vibrating braille system. If different taps on the screen can set the vibration feedback then it could be quite easy to achieve.

Nokia Braille Reader gives SMS for the blind and visually impaired. It captures received SMS messages and brings them to the foreground for reading using Braille and tactile feedback.

From, Geek

A video about the Braille technology, from Nokia Business Development

In my opinion, the advent of Nokia Braille Reader, an experimental application that gives SMS for the visually impaired is a great idea developed by Nokia and Associates. It captures received SMS messages and brings them to the foreground for reading using Braille and tactile feedback. I personally believe that this innovation shall bridge the gap between people having vision problems and the so-called " normal " people. I look forward that in the near future, I come across a "Blind Programmer". I shall expect that D-Day with great anticipation ! Long Live Nokia though I don't have a Nokia mobile !  :)