Commentaries

Khosla’s bet on cleantech looks speculative

September 9, 2009

If the world is counting on innovative companies to solve global warming, we may be in trouble. Venture investment in cleantech is slumping. Venture capitalists in the US poured $2 billion into 139 cleantech start-ups in the first half of 2008, according to data from PricewaterhouseCoopers. In the first half of this year, venture investments in the sector plummeted to $513 million in 89 companies.

Riding a green tide

August 3, 2009

PetroAlgae is one of those many clean-tech companies that seem to burn through cash faster than a Hummer goes through a gallon of gas. Yet something curious is going on with shares of this Melbourne, Florida-based company, which is hoping to make money from turning algae into oil.