A coalition of 300 environmental groups and other organizations delivered letters August 9 to nine governors in the Northeast urging them to strengthen limits for the Regional Greenhouse Gas Initiative and take other steps to improve the cap and trade program. The coalition is urging RGGI governors to reduce CO2 emissions by 20 percent below current levels by 2020 and by 80 percent by 2050 and to ensure that auction revenues are used only for energy efficiency and renewable energy programs. RGGI is undertaking a comprehensive review and is expected to make changes to the program design by the end of the year; the key item under consideration is whether the emissions cap should be lowered.