The use of solar energy by humans actually goes back deep into the centuries. As early as 700 BC people were using magnifying glasses to focus light and start fires. More recently, in 1891, Clarence Kemp, of Baltimore, patented the first solar water heater.
Click here to cancel reply.
Sorry,At this time user registration is disabled. We will open registration soon!
Don't have an account? Click Here to Signup
© Copyright GreenAnswers.com LLC