Simplify the following text for a Grade 11 native English-speaking person.
Original: The Stern Review on the Economics of Climate Change is a 700-page report released for the British government on October 30 , 2006 by economist Nicholas Stern , chair of the Grantham Research Institute on Climate Change and the Environment at the London School of Economics and also chair of the Centre for Climate Change Economics and Policy ( CCCEP ) at Leeds University and LSE .
Simplified: The Stern Review on the Economics of Climate Change is a 700-page report released on October 30 , 2006 by economist Lord Stern for the British government .