Global warming 'has had a role' in making 2012 the hottest ever recorded in the lower 48 states, says a US climatologist. The average temperature was 54.3 degrees F., a full degree higher than the previous annual record.
Congress has so far not extended the tax credit for wind energy, resulting in the layoffs of thousands of workers. Communities that a few years ago were elated to attract a promising new industry are left wondering what will the future bring.
Traffic along 180 miles of the drought-stricken Mississippi will be curtailed for a month, at a cost of billions to the barging industry, to allow the US to blast rock formations and raise river levels.
Two oil workers remain lost at sea a day after a torch being used to cut an oil pipe ignited a blaze on a production platform in the Gulf of Mexico. Officials said no oil was leaking from the charred platform,