The greenhouse effect is a natural process by which some of the radiant heat from the Sun is captured in the lower atmosphere of the Earth, thus? (Encyclopedia) methane m?th?n, CH4, colorless, odorless, gaseous saturated hydrocarbon; the simplest alkane. It is less dense than air, melts at ?184°C;, and boils at ?161.4°C;. It is? (Encyclopedia) Schwarzenegger, Arnold Alois, 1947?, Austrian-American actor, bodybuilder, and politician, b. Thal, Austria. He began competing in bodybuilding contests in his teens, and won his first? (Encyclopedia) global warming, the gradual increase of the temperature of the earth's lower atmosphere as a result of the increase in greenhouse gases since the Industrial Revolution. Global? Bush administration official and former oil-industry lobbyist, resigned his post as chief of staff of the Council of Environmental Quality in June, two days after the New York Times reported? climatologistDied: December 30, 2007 (Stockholm, Sweden) Best Known as: leader of UN climate panel that shared the 2007 Nobel Peace Prize Bert? John Bryson is the environmentalist and businessman who served as U.S. Secretary of Commerce from 2011-2013. Born in New York, John Bryson graduated from Cleveland High School in Portland, Oregon in? Global warming affects the Earth?s oceans and its wildlife by Liz Olson Related Links Quiz: Global Warming Top Carbon Dioxide Emitters The? Major U.S. news stories from the recession to same-sex marriage President Barack Obama Related Links 2009 Year in Review 2009? World News | Business News | Science/Disasters News Here are the key events in United States news for the month of April?