The authorities in Canada have said that they are planning to subject all existing oil sands pipeline proposals to tougher environmental assessments.

In an announcement made on Friday, the Obama Administration has put forth a proposal for lowering the amount of renewable fuel, Ethanol, to be blended into the US gasoline supply from 2016 onwards.

A lawsuit has been filed by federal prosecutors against Duke Energy for violating the federal Clean Water Act.

Negotiations between Royal Dutch Shell Plc and union leaders made no progress on Tuesday, as both of them argued over a new wage contract for US refinery workers who have been on strike for three days