Study: Fuels from corn waste not better than gas

Biofuels made from the leftovers of harvested corn plants are worse than gasoline for global warming in the short term, a study shows, challenging the Obama administration's conclusions that they are a much cleaner oil alternative and will help combat climate change.

Lawmakers call for tighter sanctions on Russia

Two members of the Senate Foreign Relations Committee called Sunday for beefing up western sanctions against Russia to include its petrochemical and banking industries and warned that Moscow thus far has ignored United States and European efforts to persuade it to back off its confrontation with Ukraine.

Probe could complicate Rick Perry's prospects

Texas Gov. Rick Perry has spent a record 14 years in office vanquishing nearly all who dared confront him: political rivals, moms against mandatory vaccines for sixth graders, a coyote in the wrong place at the wrong time.

In Colorado, a pot holiday tries to go mainstream

Once the province of activists and stoners, the traditional pot holiday of April 20 has gone mainstream in the first state in the nation to legalize recreational marijuana. Tens of thousands gathered for a weekend of Colorado cannabis-themed festivals and entertainment.