Ice

8,000 YEARS OF GLOBAL WARMING

Fuel-Cell Cars: The Future May Be Stuck in Neutral

Virtual Smallpox in a Real City

Jlffi '

Jlffi '

march 2005

SCIENTIFIC AMERICAN Volume 292 Number 3

COSMOLOGY

36 I Misconceptions about the Big Bang

Renewable Energy

Renewable Energy

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable.

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