Green energy comes from natural sources such as sunlight, wind, rain, tides, plants, algae and geothermal heat. These energy resources are renewable, meaning they're naturally replenished. In contrast, fossil fuels are a finite resource that take millions of years to develop and will continue to diminish with use.
|200 BC||Invention of the windmill, in China.|
|213 BC||Archimedes saves Syracuse reportedly by setting fire to Roman ships using mirrors to concentrate the sun's rays into a primitive "laser."|
|1774||French engineer Bernard Forest de Blidor publishes a treatise on water energy called Architecture Hydraulique.|
|1839||The discovery of solar photovoltaics.|
|1881||A brush dynamo generator is connected to a turbine in a flour mill to provide street lighting.|
|1882||The first hydroelectric plant is finished, in Appleton, Wisconsin.|
|1891||Clarence Kemp of Maryland invents the Climax, a solar water heater.|
|1933||Tennessee Valley Authority established.|
|1941||Palmer Putnam builds a wind turbine that generates 1.25 MW for New England.|
|1970's||The US experiences its first energy crisis. Interest in renewable energy escalates.|
|2005||Launch of the Global Wind Energy Council, in Brussels.|
While we still have plenty at the present time, current oil reserves may only last another 30 to 70 years. Fossil fuels are used much more quickly than they can be formed by nature. The sun is expected to last another 4 or 5 billion years. Solar power is available for use almost anywhere. It does not take a great deal of sunlight to produce solar power. Water, wind and geothermal power do have area limitations but fuel from waste is unlimited.