During the last week, we reported on efforts to address climate change in the electric utility and film industries. On Wednesday, the financial sector entered the fray with an announcement by Lehman Brothers. The investment bank appointed Theodore Roosevelt IV to head a new effort to address the challenges of global warming. The great-grandson of the US president will be chairman of Lehman Brothers’ Global Council on Climate Change. Roosevelt enters the position with significant experience in the environmental arena. He is chairman of the Pew Center for Global Climate Change and co-chair of the Alliance for Climate Protection. Lehman Brothers is certainly not the first investment bank to address climate change, but this decision does signify the growing momentum towards climate protection. The only question that remains is: why haven’t other firms followed suit?