4
4
4
27.7 %
only about 3 % is fresh water and less than 1 percent of that is available the rest is frozen in glaciers etc
That depends on how long ago humans developed. Assume 100,000 years, the earth is about 4,000,000,000 years old. So% = 100,000 / 4,000,000,000 x 100 = 0.0025 %
All land combined covers about 30% of Earth's surface.
The elements that are in Earths Hydrosphere is Oxygen with 33.0% of volume, Hydrogen with 66.0% of volume, and 1.0% of unknown elements.
yes this is true.
no not really
hydrosphere
Water.
hydrosphere
hydrosphere
1% of fresh water of earths...
No. It is part of the hydrosphere.
hydrosphere
no not really
No. They are part of the hydrosphere.