Oil

In an open letter defending a controversial project, Canada's natural resources minister accuses a pipeline's opponents of colluding with 'radicals' and 'jet-setting celebrities'

Brent crude nears $114 a barrel as EU ministers agree in principle to Iranian oil import ban

Encouraging economic results and Gulf standoff combine to force cost of a barrel of Brent crude over $112

Oil giant launches fresh legal action as court battle escalates

Court rules limits on sulphur dioxide and nitrogen oxide output need further review, as Keystone pipeline stand-off continues

BusinessGreen runs down the top green trends your firm should be following this year

James Murray looks back on a year of climate deals, policy U-turns, and steady progress for the green economy

NGOs claim first sale of offshore leases since BP disaster has failed to take proper account of spill risks

President will not rush decision on controversial $7bn project, despite GOP move to link approval to payroll tax deal

Negotiators insist a binding deal must include developing countries, while reports suggest US may bail on $100bn climate fund