Environmentalists like the idea because they believe it has the potential to reduce total energy consumption and thus help to curb carbon emissions and stopglobalwarming.
Some scientists and environmental groups promote 350 ppm as a safe level for CO2, but scientists acknowledge they don't really know what levels would stop the effects of globalwarming.
Some scientists and environmental groups promote 350 parts per million as a safe level for CO2, but scientists acknowledge they don't really know what levels would stop the effects of globalwarming.
They also hope an initiative to address pollution and globalwarming will stop enviromentally-conscious voters from backing Green Party nominee Ralph Nader.
Speaking on Monday at a campaign stop in Ohio, Mr Santorum hit out at the concept of globalwarming, and said that as president he would support the coal industry.