Earth also loses helium and hydrogen. The current rate of loss is about three kilograms (3 kg) of hydrogen and 50 grams (50 g) of helium per second, according t

Earth also loses helium and hydrogen. The current rate of loss is about three kilograms (3 kg) of hydrogen and 50 grams (50 g) of helium per second, according to Wikipedia. http://en.wikipedia.org/wiki/Atmospheric_escape http://en.wikipedia.org/wiki/Atmospheric_escape