Gases in our atmosphere now (%)?
Nitrogen 78% Oxygen 21% Other gases 1%
What gas was earth mainly made of in early times
Carbon dioxide
Greenhouse effect
Energy from the sun travels to earth as short wavelength radiation passing through the atmosphere
Energy is absorbed by the surface of earth
Surface of the earth radiates the energy as long wavelength radiation
The long wavelength radiation is trapped in the atmosphere by greenhouse gases
Making the temperature on earth increase
Potable water production
Choose a fresh water source
Pass it through a filter bed
Sterilize
Phytomining
Plants are grown containing metal compounds, then harvested and burned and the ash will contain metal
Bioleaching
uses bacteria
to produce solutions containing copper compounds
from which copper is obtained by displacement / electrolysis