Tech Awards 2009 recognized some pretty cool stuff last night. My favorite pick is Cows for Kilowatts.
Cows for Kilowatts solves one of the most significant sources of water pollution and greenhouse gases emissions in most developing economies - slaughterhouse waste. The anaerobic fixed film reactor featured in the Cows to Kilowatts project cleans up the waste stream and converts the collected organic waste into methane. The methane can then be used to generate electricity, or function as cheap cooking gas.