Tag Archive for geothermal

Energy right under our feet

geothermalWe’re sitting on a treasure chest of energy. It won’t be cheap to get at it, but the Earth’s heat could serve most of our needs into the far future. More than 95% of the planet’s mass is very hot – much of it around 1000 deg C on average. This is the heat left over from formation of the planet out of the space dust that was pulled together by gravity to form a molten blob of rock 4.5 billion years ago. The Earth’s crust has cooled allowing us to