Washington: There are still many secrets waiting to be gleaned from Moon rocks collected by Apollo 11 astronauts on their historic moonwalk 40 years ago.

President Barack Obama and several state officials on Tuesday announced a renewed effort to clean up the Chesapeake Bay, a once-productive waterway that has seen its crab and oyster populations plunge during decades of failed restoration attempts.

The US steel industry, hard hit by the global recession, urged Washington Monday to enforce trade laws against foreign dumping and warned THAT climate change legislation will further hurt domestic steelmakers.

"We need to make Washington stand tough on trade laws," said James Wainscott, chairman, president and chief executive of AK Steel Holdings.

The United States intends to work toward reducing emissions of potent greenhouse gases found in refrigerators and air conditioning systems but has not yet decided which international venue to use to advance the issue, US officials said on Monday.

Washington: The expression

The major nations meeting for discussions on climate change in Washington on Monday and Tuesday each have different goals for curbs on greenhouse gas emissions.

China, the United States, the European Union, Russia and India are top world emitters. Targets they set will go a long way to decide the ambition of a new UN deal to fight global warming due to be agreed in Copenhagen in December.

The United States hopes to take the reins of international efforts to battle global warming next week with a meeting of major economies aimed at facilitating a UN pact to cut greenhouse gas emissions.

The US Environmental Protection Agency said Thursday it is seeking public comment on whether to allow a higher level of ethanol to be blended into gasoline.

Growth Energy and more than 50 ethanol manufacturers petitioned the EPA last month to raise the maximum blend level for ethanol in gasoline from 10 percent to as much as 15 percent.

President Mahmoud Ahmadinejad of Iran said Wednesday that he was preparing a new proposal to resolve disputes with the West over Iran

The Obama administration wants to ensure that legislation being crafted by Congress to fight global climate change does not violate international trade rules and backfire on US exports, the top US trade official said in a letter to a Republican lawmaker.