1. a place for the burial of a corpse, esp beneath the ground and usually marked by a tombstone. 2. something resembling a grave or resting place: the ship went to its grave. 3. the grave a poetic term for death. 4. have one foot in the grave informal to be near death.
Without this greenhouse effect, the average surface temperature would be 255 degrees kelvin (-18 degrees Celsius or 0 degrees Fahrenheit); a temperature so low that all water on Earth would freeze, the oceans would turn into ice and life, as we know it, would not exist.
A. Much of the infrared radiation emitted by Earth's surface is absorbed and reemitted by atmospheric gases. B. The result is a greenhouse effect that warms the surface by about 33 degrees C. Without this natural greenhouse effect, Earth would be too cold to support life.