Some of the largest institutional investors in the world have called on the US Congress to introduce a mandatory national policy to reduce greenhouse gas emissions by up to 90% below 1990 levels by 2050. The group of 40 investors, also wants the financial regulator, the US Securities and Exchange Commission (SEC), to insist that companies disclose their exposure to climate change risk.
http://www.guardian.co.uk/money/2008/feb/15/investmentfunds.economics