Reviews the generation and usage of hydroelectric power.
The Three Gorges Dan in China is the largest hydropower project in the world. The dam supplies clean energy to the country, but it has come with environmental and cultural costs.
Algae has some tremendous advantages over other biofuels including that it grows easily and in spots where other crops do not grow. Algae burns relatively cleanly and is almost carbon neutral.
In this news audio report, tidal power is explained as it can be a very effective and useful source of renewable energy.