To meet the target of 2-degrees Celsius (3.6-degrees Fahrenheit) cap on global warming endorsed by world leaders require a 40 percent to 70 percent reduction in heat-trapping gases by 2050 from 2010 levels according to the third installment of the UN`s biggest-ever study of climate change, the world would need to triple the share of renewable, nuclear power and carbon-capture storage to meet the goal. It’s very important that more trees are planted because less matured forest play more important role in sucking carbon from the atmosphere than the older ones, the old forests and trees had already hold huge amount of carbon in them. Under the United Nation clean development mechanism, large- scale tree planting project in developing countries may apply for emission credits that can be traded and sold. And more than 650,000 individual trees from 403 species as part of photosynthesis, trees absorb greenhouse gases that cause global warming. The Stern Report is a widely-cited report from the U.K Government led by former World Bank chief economist Nicholas stern calculated lower costs for mitigation and higher costs for inaction. It said that the impact of global warming could cost the world as much as 20 percent of economic output, compare with 1 percent cost of containing the problem. Other findings from the UN studies the following

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Greenhouse gas emission grew by average 2.2 percent per year between 2000 and 2010. Global emissions since 1970 outstrip those for the preceding 220 years Just 10 nations  accounted for 70 percent of emission in 2010. Industrial emission from developing nations now exceed those from industrialized ones, through high income nation are net importers of carbon dioxide emissions embedded in goods from abroad. Pledges for emission cuts by 2020 that were made by the world`s biggest emitters in 2010 do not correspond to lower cost emission reduction trajectory and would lead to greenhouse gas concentration of much as 650ppm by 2100.The lowest-cost global efforts to fight climate change involves making the majority of investment in developing nations like Nigeria.