curb soot and smog to keep earth cool
Last Updated : GMT 09:07:40
Egypt Today, egypt today
Egypt Today, egypt today
Last Updated : GMT 09:07:40
Egypt Today, egypt today

Curb soot and smog to keep Earth cool

Egypt Today, egypt today

Egypt Today, egypt today Curb soot and smog to keep Earth cool

Paris - AFP

Sharply reducing emissions of soot and smog could play a critical role in preventing Earth from overheating, according to a UN report released on Tuesday. Curbing these pollutants could also boost global food output and save millions of lives lost to heart and lung disease, said the report from the UN Environment Programme (UNEP) and the World Meteorological Organisation (WMO). Even as climate talks remain deadlocked on how to share out the task of cutting CO2, parallel action on "black carbon" particles and ground-level ozone would buy precious time in the quest to limit global temperature rise to 2.0 degrees Celsius (3.6 degrees Fahrenheit), it said. Record output in 2010 of carbon from energy use and unprecedented CO2 levels in the atmosphere suggest that efforts to maintain the 2.0 C cap, widely seen as a threshold for dangerous warming, may already be doomed, say scientists. On current trajectories, temperatures are set to go up 1.3 C (2.3 F) -- on top of the 0.9 C (1.6 F) jump since human-induced warming kicked in -- by 2050, bringing the total compared to preindustrial levels to 2.2 C (4.0 F). But quickly tackling black carbon and smog-related ozone could slash 0.5 C (0.9 F) off the temperature increase projected for 2030, putting the two-degree target back on track, the new findings suggest. "There are clear and concrete measures that can be undertaken to help protect the global climate in the short and medium term," said Drew Shindell, a researcher at NASA's Goddard Institute for Space Studies and one of the 50 scientists behind the new assessment. "The win-win here for limiting climate change and improving air quality is self-evident and the ways to achieve it have become far clearer." The report was unveiled in Bonn as delegates from more than 190 nations under the UN Framework Convention on Climate Change (UNFCCC) struggle to make headway in the deeply stymied negotiations. Black carbon, found in soot, is a byproduct of incomplete burning of fossil fuels, wood and biomass, such as animal waste. The most common sources are car and truck emissions, primitive cook stoves, forest fires and industry. Soot suspended in the air accelerates global warming by absorbing sunlight. When it covers snow and ice, white surfaces that normally reflect the Sun's radiative force back into space soak up heat instead, speeding up the melting of mountain glaciers, ice sheets, and the Arctic ice cap. The tiny particles have also been linked to premature death from heart disease and lung cancer. Ground-level, or tropospheric, ozone -- a major ingredient of urban smog -- is both a powerful greenhouse gas and a noxious air pollutant. It is formed from other gases including methane, itself a potent driver of global warming. A threefold increase in concentrations in the northern hemisphere over the last century has made it the third most important greenhouse gas. Unlike carbon dioxide, which lingers in the atmosphere for centuries once emitted, black carbon and ozone disappear quickly when emissions taper off. "The science of short-lived climate forcers has evolved to a level of maturity that now requires ... a robust policy response by nations," said Achim Steiner, Executive Director of UNEP. Measures recommended for reducing black carbon include mandatory use of diesel filters on vehicles, phasing out wood-burning stoves in rich countries, use of clean-burning biomass stoves for cooking and heating in developing nations, and a ban on the open burning of agricultural waste. For ozone, the report calls for policies that curb organic waste, require water treatment facilities to recover gas, reduce methane emissions from coal and oil industries, and promote anaerobic digestion of manure from cattle and pigs, both major sources of methane. The report estimates that nearly 2.5 million deaths from outdoor pollution, mainly in Africa and Asia, could be avoided every year by 2030 if black carbon levels dropped significantly. Far less ground-level ozone could also avoid important losses in global maize, rice, soybean and wheat production, it said.

egypttoday
egypttoday

Name *

E-mail *

Comment Title*

Comment *

: Characters Left

Mandatory *

Terms of use

Publishing Terms: Not to offend the author, or to persons or sanctities or attacking religions or divine self. And stay away from sectarian and racial incitement and insults.

I agree with the Terms of Use

Security Code*

curb soot and smog to keep earth cool curb soot and smog to keep earth cool



GMT 21:06 2017 Monday ,01 May

Will Smith at all-star Jazz Day in Cuba

GMT 06:25 2017 Monday ,27 November

Bali raises volcano alert to highest level

GMT 12:45 2018 Monday ,26 November

Israeli forces close entrance of village in Ramallah

GMT 12:14 2018 Monday ,08 October

HM King congratulates Ugandan President

GMT 13:49 2017 Thursday ,17 August

Alibaba posts 94% surge in quarterly profit

GMT 08:47 2017 Saturday ,10 June

CDD responds to 236 various incidents

GMT 00:31 2015 Saturday ,16 May

Canada plans 30% CO2 emissions cut by 2030

GMT 03:31 2017 Wednesday ,22 February

‘Man-made’ climate change a major woman’s problem

GMT 10:42 2017 Thursday ,16 November

Algeria FM leaves Cairo following tripartite meeting

GMT 11:08 2017 Tuesday ,03 October

Moscow, Riyadh willing to boost cooperation
 
 Egypt Today Facebook,egypt today facebook  Egypt Today Twitter,egypt today twitter Egypt Today Rss,egypt today rss  Egypt Today Youtube,egypt today youtube  Egypt Today Youtube,egypt today youtube

Maintained and developed by Arabs Today Group SAL.
All rights reserved to Arab Today Media Group 2021 ©

Maintained and developed by Arabs Today Group SAL.
All rights reserved to Arab Today Media Group 2021 ©

egypttoday egypttoday egypttoday egypttoday
egypttoday egypttoday egypttoday
egypttoday
بناية النخيل - رأس النبع _ خلف السفارة الفرنسية _بيروت - لبنان
egypttoday, Egypttoday, Egypttoday