Government policy, entrepreneurship and consumer awareness will accelerate clean technology innovation in China — and the future is bright for investors, says venture capitalist Gary Rieshel.

Cleaner and more efficient technologies are needed in all China's industries.

Cornell plant scientists have invented a new method that uses manure and other farm byproducts to remove toxic hydrogen sulfide from biogas -- a renewable energy source derived from the breakdown of animal waste.

Hydrogen sulfide can combine with water to cause acid rain and to corrode engines. Its removal makes biogas a more viable alternative fuel source. The new method will be marketed under the name SulfaMaster.

In 331 days' time, 15,000 officials from 200 countries will gather in the Danish capital with 1 goal: to find a solution to global warming. Michael McCarthy, Environment Editor, presents the first in a series of dispatches on the crucial summit

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