Intrusion into the Carbon Cycle 

In  the carbon cycle, as long as the average amount of carbon dioxide hair and in water remains the same, a happy situation prevails. If the tendency is for it to increase. a point will come when some animals will find it  intolerable for their breathing. If  the tendency is for carbon dioxide to decrease,  then. over a large number of years. a point will be  reached when plants would not be able to photosynthesise and produce oxygen for animal life. So. we can see how  important  it  is to maintain a balance in this cycle.

In  the present century, the carbon cycle has been impaired by non-judicious  utilisation of fossil fuels, indiscriminate cutting of forests and changes in  land use from agriculture  to the cement and concrete  roads and buildings, which  reduces the area under plantation. We see enormous amount of smoke emanating from some of our industries, vehicles, accidental fires, aeroplanes, and some also from kitchens. This adds carbon dioxide to the atmosphere in amounts much  larger  than can be  tackled in natural course.

Carbon dioxide input has been increasing since the beginning of Industrial Revolution some 100  years ago, and since  then  its concentration has increased considerably  in  the atmosphere. The major concern over increased carbon dioxide content, is its possible effect on  the temperature of the air surrounding  the earth. Excessive carbon dioxide in  the atmosphere  tends to trap the heat radiated by the earth.