Or that's the version we were told, anyway. The teenagers were called Eric Harris and Dylan Klebold, and their school was Columbine High, an idyllic sounding place nestled between the Denver metropolitan area and the foothills of the Rocky Mountains.
This is because the amount of sunlight the reaches the equator changes very little, although the temperatures do vary somewhat during the rainy season. Measurement: The average surface temperature on Earth is approximately 14Â°C; but as already noted, this varies.
The Earth's average surface temperature of 14 Â°C (57 Â°F) would otherwise be about -19 Â°C (-2.2 Â°F) in the absence of the greenhouse effect. Global warming, a recent warming of the Earth's lower atmosphere, is believed to be the result of an enhanced greenhouse effect due to increased concentrations of greenhouse gases in the atmosphere. In addition to the Earth, Mars and Venus have greenhouse effe