Oxygen Cycle

Oxygen Cycle

Oxygen Cycle

Similarly in the oxygen cycle the imbalances are likely to emerge due to industrial combustion since 1860’s industrial revolution and decreasing vegetation cover.

Hydrogen or Hydrological Cycle

It is also called hydrological cycle or water cycle as most of the hydrogen circulates in the biosphere in the form of H₂O- moisture or water. Hydrological cycle at global scale involves following sequential processes as Evaporation →Condensation → Precipitation (rainfall, snowfall) → Percolation into the ground and surface runoff, both eventually transferring to water bodies and oceans →Evaporation again.

Water is an important substance in the biosphere because

(i)                 It is able to dissolve almost all substances;

(ii)               It has great ability to store heat;

(iii)             It takes part in the nourishment of organisms and

(iv)              It helps in the circulation of elements in the biosphere etc

Any disturbance in the hydrological cycle through cumulative effects of decreased ground water storage due to urbanization, deforestation, decreased water level on the continents may have hazardous effects, though its full knowledge is not yet derived.