Truly, you couldn’t make this up.

SAUSALITO, Calif. — Tony Blair, the former British prime minister, is turning his attention to Silicon Valley. Mr. Blair is becoming a senior adviser at Khosla Ventures, the venture capital firm founded by Vinod Khosla, an investor and a proponent of green technology.

Khosla Ventures, which Mr. Khosla founded in 2004 after leaving the venture capital firm Kleiner Perkins Caufield & Byers, made the announcement here on Monday at a meeting of its investors. The firm is investing $1.1 billion in clean technology and information technology companies.

Mr. Blair will offer strategic advice on public policy to the firm’s green portfolio companies. They include Calera, a manufacturer that uses carbon dioxide to create cement products; Kior, which converts biomass like wood chips into biofuels; and Pax Streamline, which aims to make air-conditioning more environmentally friendly.

“The more I studied the whole climate change issue and linking it with energy security and development issues, I became absolutely convinced that the answer is in the technology,” Mr. Blair said in an interview.

You know what this appointment reminds me of? Mike Lynch’s decision to appoint Richard Perle (aka the US Prince of Darkness) to the Board of Autonomy.