BP ratcheted up the rhetoric around multi-billion dollar claims from the Gulf oil spill by warning it would "vigorously" contest lawsuits over one of the world's worst environmental disasters.

BP Plc has not yet applied for permission to drill its first new Gulf of Mexico oil well since the 4 million-barrel Macondo spill a year ago, the oil major said on Tuesday, although it received per

BP Plc's $85 million settlement with the U.S.

Differences between rich and developing countries prevented G20 finance ministers from agreeing measures on Saturday to curb global warming, casting more doubt on U.N. efforts to agree a new climate treaty.

OPEC said oil was not to blame for climate change and consuming countries should pay to fight the threat, while the CEO of Royal Dutch Shell said drivers could help by not buying Hummer sports utility vehicles.

"Oil is not responsible," the producer group's Secretary General, Abdullah al-Badri, told reporters on Thursday on the sidelines of the International Oil Summit in Paris.