Key drivers include eroding tolerance by customers for rate increases; denial by state regulators to recover our investments in carbon capture and renewable energy; slow economic recovery in most of our states; more complex and stringent environmental regulations that will push customer rates still higher; the rising cost to operate older, less efficient coal units; the cost-competitiveness of natural gas compared with other fuels; a dramatically different political landscape; and new concerns about the future of nuclear power in the wake of the Japanese nuclear crisis.