"Oil prices saw their sharpest drop in two years, shedding more than $2 a barrel as mild US weather led consumers to use less petrol and heating oil."
Perhaps global warming has its benefits too as consumers used less heating oil in surprisingly warm winters all over the US (except perhaps Denver which seems to have got all the snow for a century). Despite OPEC threatening to trim its output, the price of oil has fallen sharply since peaking above $78 in July and now stands at $55.59 a barrel in New York.