Guardian: The fight against climate change will get an unexpected boost today from oil-rich Gulf states which will pledge to invest some of their petrodollar profits in British green energy projects. The surging oil price over the past year has left parts of the Middle East awash with cash as the rest of the world is squeezed by the credit crunch, making Arab royals some of the few active investors worldwide. The Gulf states have enjoyed a $1.4 trillion windfall from higher oil prices since …