Feds push for tough controls.
Industry sees little evidence of danger.
Along the way he noted that one, the Grinnell glacier, has lost 80 percent of its mass since its discovery. Global warming is no longer a theory. It is a reality. And it is time to act. But Gore's stepped-up campaign against global warming is getting an icy reception in Detroit, where auto industry executives fear the Clinton administration's plans to curb carbon dioxide emissions will devastate the economy, cost automakers millions to clean up factories and force them to sell compact cars no one wants to buy.