... short, if you have a room in a house that receives passive solar energy in the form of sunlight, this would raise the internal temperature of the room..., as the sun is hot enough to heat the water without any additional energy use.
4 Answers · Environment · 27/02/2012
Present use of Solar Energy is too expensive and complicated to be cost effective or efficient. ...definite progress to reduce costs of solar energy collection and distribution, and...
7 Answers · Science & Mathematics · 15/11/2008