The San Francisco-based bank also pledged $100m in grants to support community environmental efforts and a 40% improvement in its own energy efficiency.
Chief executive John Stumpf says the goals reflect a belief that the company's responsibility includes "promoting the long-term economic prosperity and quality of life of the communities we serve".
Wells Fargo's 2011 environmental financing portfolio totaled $2.8bn, bringing it to $11.7bn
