Original sentence: He was the director of energy research at the United States Department of Energy but was fired in 1993 speaking out against the Clinton administration's views on climate change.In Febuary of 2009 Happer testified before congress that global-warming fears were mistaken and that the earth has too little Carbon Dioxyide
Edited sentence: He was the director of energy research at the United States Department of Energy but was fired in 1993 because he had spoken out against hysteria over ozon and climate change.In Febuary of 2009 Happer testified before congress that global-warming fears were mistaken and that the earth has too little Carbon Dioxydie