Sweet dreams are made of geoengineering

LONDON (Reuters) - Farming plankton, sending solar panels into orbit, remodeling hydrogen -- for the latest wave of entrepreneurs suggesting easier ways out of climate change, it's all in a day's pitching.

Beyond grabbing headlines, such notions are attracting serious scientific attention and venture funding from investors who at least until the collapse of Lehman Brothers lent credibility to high-risk investment propositions.

Some plans seek radical alternatives to fossil fuels. Other businesses are dreaming of geoengineering -- planning to tweak the earth's climate by removing heat-trapping carbon dioxide (CO2) or reflecting sunlight into space.

Among new energy fixes presented to Reuters in recent days is U.S.-based BlackLight Power. link...