Global warming
Global warming describes an increase in the average temperature of the Earth's atmosphere and oceans. The terms global warming or anthropogenic global warming are also used to describe the theory that increasing temperatures are the result of a strengthing greenhouse effect caused primarily by man-made increases in carbon dioxide and other greenhouse gases.
Related Topics:
Average temperature - Earth's atmosphere - Ocean - Greenhouse effect - Carbon dioxide - Greenhouse gas
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The scientific opinion on climate change, as expressed by the UN Intergovernmental Panel on Climate Change (IPCC) and explicitly endorsed by the national science academies of the G8 nations, is that the average global temperature has risen 0.6 ± 0.2 °C since the late 19th century, and that "most of the warming observed over the last 50 years is attributable to human activities", most prominently the emission of greenhouse gases such as carbon dioxide (CO2) and methane (CH4). A small minority of qualified scientists contest the view that humanity's actions have played a significant role in increasing recent temperatures. Uncertainties do exist regarding how much climate change should be expected in the future, and a hotly contested political and public debate exists over what actions, if any, should be taken in light of global warming.
Related Topics:
Scientific opinion on climate change - UN - Intergovernmental Panel on Climate Change - G8 - C - Attributable to human activities - Methane - Small minority of qualified scientists - Climate change
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Based on the climate models referenced by the IPCC, temperatures may increase by 1.4 to 5.8 °C between 1990 and 2100 http://www.sciencemag.org/cgi/reprint/309/5731/100.pdf. This is expected to result in other climate changes including rises in sea level and changes in the amount and pattern of precipitation. Such changes may increase extreme weather events such as floods, droughts, heat waves, and hurricanes, change agricultural yields, or contribute to biological extinctions. Although warming is expected to affect the frequency and magnitude of these events, it is very difficult to connect any particular event to global warming.
Related Topics:
Climate model - Sea level - Precipitation - Flood - Drought - Heat wave - Hurricane - Agricultural - Extinction
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~ Table of Content ~
| ► | Introduction |
| ► | Overview |
| ► | Warming of the Earth |
| ► | Causes of global warming |
| ► | Climate models |
| ► | Issues |
| ► | Public controversy |
| ► | Effects |
| ► | Mitigating and adapting to global warming |
| ► | References |
| ► | See also |
| ► | External links |
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Latest news on global warming
CLIMATE CHANGE: Talks Could Learn From Indigenous Groups
UNITED NATIONS, Nov 21 (IPS) - As the United Nations readies for a key climate change meeting in Poland next month, a London-based human rights group warns that any new deal on global warming would be seriously compromised if the most vulnerable groups, specifically indigenous peoples, are shut out of the negotiations.
Carbon capture and electric energy at centre of climate plans
Important decisions about the future of coal power in Britain are likely to be made today when the government's climate change committee sets out plans to de-carbonise the economy.The committee will publish its first report recommending how Britain can achieve its target of cutting greenhouse gas emissions by 80% by 2050, which could eventually see the country ending almost all fossil fuel use to generate energy or run cars and public transport.It will also urge quicker development of carbon capture and storage for coal power, and recommend whether government should allow coal plants to be built before the technology is fully developed.Environmentalists hope the committee will set emissions standards from about 2020 which would force coal plants to fit at least some capture equipment, possibly with increasingly tough limits. Critics believe such a move would make it too risky or expensive to proceed with a coal-fired power station at Kingsnorth, Kent, and up to seven others, unless the technology has been proved to work.Jeff Chapman, chief executive of the Carbon Capture and Storage Association, said with enough government financial support there could be partial trials by 2015 and full capture in 2020."We've talked the talk, now it's walk the walk time," he said. Under the climate change bill, which received royal assent last week, Britain set the world's first legally-binding target to cut emissions of CO2 and other greenhouse gases. The climate change committee will recommend interim targets up to 2022, taking into account both the 2050 target and the EU's pledge to reduce emissions by 20-30% by 2020. Friends of the Earth has urged the committee to ask for a 40% cut by 2020.The report, Building a Low Carbon Economy - Britain's Contribution to Tackling Climate Change, will set out a transformation of Britain's economy, including widespread reliance on electric energy for homes and industry, and to power transport. Electricity generation is likely to be based on renewable energy, nuclear power and coal with carbon capture.The committee will suggest what proportion of cuts can be "bought" as credits for overseas carbon-reduction schemes, and how the interim targets should be increased to account for emissions from aviation and shipping.An interim report this year estimated the cost of meeting the 2050 target would be 1-2% of GDP. Ministers are due to respond to the full report in March.The report comes as international talks on a climate change treaty resume today in Poznan, Poland. The negotiations aim to set the stage for a deal in 2012 on global warming to succeed the Kyoto protocol, which needs to be agreed by this time next year at a meeting in Copenhagen. Insiders say the Poznan talks are not expected to produce a breakthrough, as negotiators will wait for the new US administration to declare its intentions.Yvo de Boer, executive secretary of the UN climate secretariat, said the Poznan meeting was not likely to be "exciting" but important progress could be made on issues such as how rich countries help the developing world cope with the impact of climate change."The whole issue of adaptation needs to be taken off the back burner and receive a lot more serious attention," he said. The talks could also work out a way to pay tropical countries to protect their forests, as a cost-effective way to tackle rising CO2 emissions despite fears from green campaigners that a lack of land rights could see the money diverted.The Poznan talks follow a meeting in Bali last December where countries agreed to formally negotiate a new treaty. Analysts say it needs to be agreed at Copenhagen for it to come into force by 2012.De Boer said: "I think it is important that countries in Copenhagen reach a political agreement that is a response to what scientists tell us need to be done."Andy Atkins, executive director of Friends of the Earth, said: "Over the next two weeks [Gordon] Brown's government will shape an international deal that could settle whether we conquer climate change, or let the planet cook. The UK needs to ... lead all developed countries in committing to cutting their greenhouse gas emissions by 40% by 2020."Carbon emissionsCarbon capture and storage (CCS)Fossil fuelsClimate changeClimate changeEnergyGreen politicsguardian.co.uk © Guardian News & Media Limited 2008 | Use of this content is subject to our Terms & Conditions | More Feeds
Global Warming Doom: Deja Vu for Earth?
Scientists draw parallels to "the mother of all mass extinctions."
How Global Warming Will Affect U.S. Beaches, Coastline
Scientists are finding that sea level rise will have different consequences in different places but that they will be profound on virtually all coastlines.
Global Warming Could Lead To More Arctic Energy
BRUSSELS - The Arctic offers new energy and fishing resources as a result of global warming and new technology, the European Union said on Thursday.
Global warming could lead to more Arctic energy
The Arctic offers new energy and fishing resources as a result of global warming and new technology, the European Union said on Thursday.
Global Warming Declaration To Be Signed In California (AHN)
(AHN) - California Gov. Arnold Schwarzenegger is expected to host a two-day global warming summit where a declaration on reducing climate change emissions will be signed by other U.S. governors and world leaders. - Mon, 17 Nov 2008 06:38:10 GMT
INTERVIEW - Tax Polluters For Global Warming Funds - UN Official
BEIJING - The global financial gloom will make citizens of rich nations reluctant to use their taxes to fight global warming and any plan to help poor nations should make the polluters pay, a top UN climate official said.
Tax polluters for global warming funds: U.N.
The global financial gloom will make citizens of rich nations reluctant to use their taxes to fight global warming and any plan to help poor nations should make the polluters pay, a top U.N. climate official said.
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