U.S. lawmakers pushing to include greater recognition for existing nuclear power in a national renewable energy standard failed to win new breaks for the industry when a U.S. congressional panel on Wednesday voted down an amendment to a controversial climate change bill.

The United Nations issued a range of rival ideas for fighting climate change from rich and poor nations on Wednesday and said the world was "not standing still" in work on a new U.N. treaty.

Nearly a third of the world's cement industry has united on a strategy to cut global warming gases in a way that will not slow a construction boom in poor countries, backers of the initiative said on Wednesday.

The nationwide automobile mileage and emissions standards announced by President Obama on Tuesday represent a huge step forward in the effort to limit greenhouse gases and reduce America

President Barack Obama took aim at climate-warming greenhouse gases on Tuesday and ordered the struggling auto industry to make more fuel-efficient cars under tough new national standards to cut emissions and increase gas mileage.

President Barack Obama on Tuesday unveiled an aggressive policy initiative to increase U.S. auto fuel efficiency and regulate auto emissions.

President Barack Obama's tough fuel economy program for vehicles could put another damper on the struggling ethanol business, because the alternative fuel packs a lower energy content than gasoline.

President Barack Obama announced the first national standard for greenhouse-gas emissions from automobiles and tougher fuel mileage standards that mark the most sweeping new regulation of the industry in decades.

Royal Dutch Shell, Europe

US Congress is making a hash of climate change proposal

Whether a climate change bill emerges from the US Congress this year is much in doubt. Most Republicans still oppose the very idea of reducing emissions of greenhouse gases. Democrats are less than united in their commitment to it, once forced to consider the implications. The signs are that if a bill does somehow pass, it will be ugly.