Understanding the risks and what can be done to stem Global Warming effects are being addressed at all levels – individual, community, government agency and organization and at the international level. 
The United Nations has meetings where world leaders agree on what to do about global warming. Every five years, the Earth Summit happens. Global warming is primarily a problem of too much carbon dioxide (CO2) in the atmosphere—which acts as a blanket, trapping heat and warming the planet. global warming and global cooling are alternate process that happens through out the history of the earth. Global warming is a natural process that will occur no matter what, nobody is going to stop that. What we can do is reduce the speed of it being happenning. Global Warming affects us all, every living thing. Understanding the risks and what can be done to stem Global Warming effects are being addressed at all levels – individual, community, government agency and organization and at the international level. Below you will find some information about who is doing what. The term global warming refers to the increase in the average temperature of global surface air and oceans since about 1950, and to continuing increases in those temperatures. Global Warming is the increase of Earth's average surface temperature due to effect of greenhouse gases, such as carbon dioxide emissions from burning fossil fuels or from deforestation, which trap heat that would otherwise escape from Earth. This is a type of greenhouse effect. To prevent global warming, some measures that must be taken are to  reduce carbon dioxide emissions produced through the burning of  fossil fuel and human activity. Global warming is when the average temperatures rise all around the planet. This happens when greenhouse gases such as carbon dioxide, methane, and nitrous oxide trap heat from the sun in the earths atmosphere.
http://news.bbc.co.uk/cbbcnews/hi/find_out/guides/world/global_warming/newsid_1575000/1575498.stm http://www.climatehotmap.org/about/global-warming-causes.html https://answers.yahoo.com/question/index?qid=20061219065523AA5uLGj http://www.kerstings.org/donetoprevent.html http://usliberals.about.com/od/environmentalconcerns/a/GlobalWarm1.htm http://www.nmsea.org/Curriculum/Primer/Global_Warming/fossil_fuels_and_global_warming.htm http://www.answers.com/Q/What_is_being_done_to_prevent_global_warming http://www.ledlights.org/Global-Warming/What-is-Being-Done-to-Stop-Global-Warming.html
What is Being Done About Global Warming