Of more immediate concern regarding carbon cycle is
Output rate of carbon locked in deposits of coal, petroleum and natural gas
Green house gases
Increase in the total mass of carbon in earth's atmosphere by $ 12-14\%$
All above
Noosphere relates to an environment dominated by
In ecosystem lithosphere is concerned with
Burning of fossil fuels affects
Phosphorus is the major constituent of
$I.$ biological membranes
$II. $ nucleic acids
$III.$ cellular energy
Choose the correct option
Halophytes are