So Kenny Boy wasn't just W's buddy. From the first of a series of articles in the Financial Post (Canada):

The climate-change industry ... has emerged as the world’s largest industry. ... Some of the climate-change profiteers are relatively unknown corporations; others are household names with only their behind-the-scenes role in the climate-change industry unknown. ... This series begins with Enron, a pioneer in the climate-change industry.

Almost two decades before President Barack Obama made “cap-and-trade” for carbon dioxide emissions a household term, an obscure company called Enron — a natural-gas pipeline company that had become a big-time trader in energy commodities — had figured out how to make millions in a cap-and-trade program for sulphur dioxide emissions, thanks to changes in the U.S. government’s Clean Air Act. To the delight of shareholders, Enron’s stock price rose rapidly as it became the major trader in the U.S. government’s $20-billion a year emissions commodity market.

Enron Chairman Kenneth Lay, keen to engineer an encore, saw his opportunity when Bill Clinton and Al Gore were inaugurated as president and vice-president in 1993. To capitalize on Al Gore’s interest in global warming, Enron immediately embarked on a massive lobbying effort to develop a trading system for carbon dioxide.... To magnify the leverage of their political lobbying, Enron also worked the environmental groups.

The intense lobbying paid off. Lay became a member of president Clinton’s Council on Sustainable Development, as well as his friend and advisor. In the summer of 1997, prior to global warming meetings in Kyoto, Japan, Clinton sought Lay’s advice in White House discussions. The fruits of Enron’s efforts came soon after, with the signing of the Kyoto Protocol.

[From an internal memo, posted from Kyoto]: “Enron now has excellent credentials with many ‘green’ interests including Greenpeace, WWF [World Wildlife Fund], NRDC [Natural Resources Defense Council], German Watch, the U.S. Climate Action Network, the European Climate Action Network, Ozone Action, WRI [World Resources Institute] and Worldwatch." [Furthermore]: “I now predict ratification within three years. I predict business opportunities within 18 months. I predict this agreement will have very significant influences on the energy sector within OECD and transitional economies and will accelerate renewable markets in developing countries. This agreement will be good for Enron stock!!”