opportunity cost, definition of

Electromagnetic energy transmitted from the sun (solar radiation). The amount that reaches the earth is equal to one billionth of total solar energy generated, or the equivalent of about 420 trillion kilowatt-hours.

Solar energy is the major driver of Earth's environment. About one 1kw per hour per meter square makes it way to the ground. Changes in solar energy over extended periods contributes to environmental shifts (Ice Ages).

• Global Warming, climategate, big business and being green
  The theory of man made global warming is turning into an excuse to derive profit from peoples good nature, what is going on?..
• Climategate, what is going on?
  Global warming, climate change, greenhouse effect and climategate; how 'valid' is the climate science?

• Solar Panels for your home, with the reduced feed-in tariff, are they a sound investment?
  We take a more detailed look at solar panels and help you work out if investing your money in solar is the right thing to do for you and the environment.
• Feed-in tariff for NSW reduced to 20c/kWh
  New South Wales has reviewed its feed-in tariff and reduced it to 20c/kWh, we look at what this means.
• energy efficient homes and energy saving
  Energy saving is something we all want to achieve at home through better efficiency. We look at the options available to you.
• Chicago Climate Exchange drops 50%, new record low
  Basically, if it gets any lower it will be ZERO..