From this Greenbiz.com site:
Detroit, MI — April 10, 2008 — Bowing to pressure from a bloc of shareholders, Ford has become the first automaker to detail its strategy to reduce its fleet's greenhouse gas emissions 30 percent by 2020.

Excerpts:
"Last month, the company shared its plans with investors that included religious and activist groups, such as the $100 billion-strong Interfaith Center on Corporate Responsibility and Ceres-directed Investor Network on Climate Risk, which represents assets of around $5 trillion. The Connecticut State Treasury also is a participating shareholder."

..."The target falls in line with recent auto mileage legislation put in place to improve fuel economy to 35 miles per gallon by 2020. The company said it would be unable to meet tougher limits for 2016 being sought by California."