Financial Week: After a stuttering start, the green revolution appears to be steadily making its way into corporate boardrooms. An increasing number of businesses–IBM, for one–are now conducting annual surveys of carbon dioxide footprints. Some, such as Nike, are filing C02 inventories with national or private registries. Others, including power producer Entergy, are purchasing greenhouse gas credits. And a few businesses are actually tying executive bonus pay to environmental targets (see "The Greener the …