Plot: 2010/04/02 Headlines: EPA Places New Limits on Mountaintop Removal; US Limits Greenhouse Emissions in Cars; Murderer of Abortion Provider Dr. George Tiller Sentenced to Life Term; Israel Threatens New Assault on Gaza Strip; Karzai Accuses Ex-UN Official of Steering Electoral Fraud; Amazonian Land Activist Killed in Brazil; Report: Africa Lost $1