Delhi chokes on toxic smog after Diwali festival

New Delhi was shrouded in a thick blanket of toxic smog Monday after millions of Indians lit firecrackers to mark the Diwali festival, with authorities reporting record levels of pollution in parts of the capital.

EPA proposes tougher fuel-efficiency standards for trucks

The Obama administration on Friday proposed tough new standards to improve fuel efficiency and reduce carbon dioxide pollution from trucks and vans, the latest move by President Barack Obama to address global warming.

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