NASA warned plan to send humans to Mars may fail

The US space agency NASA has been warned that its mission to send humans to Mars will fail unless its revamps its methods and draws up a clear, well-planned strategy to conquer the red planet.

Carbon plan still leaves US short of UN pledge

President Barack Obama's plan to cut the carbon emissions of US power plants by up to 30 percent will leave America far short of its current pledges at UN climate talks, a study said Wednesday.

New pollution rule puts onus on states

A major initiative to cut the pollution emitted from the nation's power plants set off a scramble Monday in Washington - where Republicans instantly pounced on the proposed rules - and in states, where much of the work in ...

House passes curbs on NSA phone surveillance (Update 3)

The House moved the U.S. closer to ending the National Security Agency's bulk collection of Americans' phone records Thursday, the most significant demonstration to date of leaker Edward Snowden's impact on the debate over ...

Obama promotes influx of foreign investment in US (Update)

President Barack Obama held a little-noticed meeting in March with executives of a Belgian aerospace company while in Brussels to meet European leaders. It was barely a footnote in a trip dominated by tensions with Russia ...

Cisco chief writes to Obama to decry NSA activities

Cisco chief executive John Chambers has complained to US President Barack Obama about the National Security Agency's spying practices, saying they were harming overseas business for US tech firms.

Climate warnings ignored with US elections looming

The U.S. Congress, ignoring dire new warnings about climate change, continues to shy away from legislation that might mitigate the effects of global warming, leaving President Barack Obama with limited tools to reduce greenhouse ...

Obama renews solar bid despite setbacks

President Barack Obama praised Friday measures taken by his administration to develop solar energy in the United States, despite attacks and setbacks from his Republican opponents.

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