The United States first imposed standards for emissions of carbon dioxide produced bypower plants, especially for coal-fired, singled out for their responsibility in climate change.
After more than a year of reflection on these measures politically controversial, theProtection Agency (EPA) has ensured that new regulations would apply only to future plants and existing coal plants could continue to work if they are brought into conformity with these new rules.
"For now, there is no limit to the amount of pollution generated by carbon dioxide that future power plants can emit. And threats to health and economic concerns that climate change continue to grow" , said Lisa Jackson, the director of the EPA, in a statement.
"We set standards that are based on the use of clean technology, U.S., which will help totackle the challenge that we can leave our children and our grandchildren a legacy," shestressed.
Overall, plants and refineries are responsible for nearly 40% of emissions ofgreenhouse gases in the United States.
The administration of President Barack Obama has pledged to reduce emissions ofcarbon dioxide, but its efforts were thwarted by the energy sector and its rivals in theRepublican party, some of whom doubt the reality of climate change .