How and why earth's principal biological systems being depleted?
Answers
There are four principal biological systems of the Earth - (1) fisheries (2) forests (3) grasslands (4) croplands, as pointed by Mr Lester R Brown. Unfortunately, the human claims on these systems as reaching points, where their productivity is getting impaired. The protein hungry world is over-fishing every day. In poor countries, local forests are being .destroyed everyday to get firewood for cooking. The growing use of dung for burning deprives the soil of an important natural fertilizer. The forests precede mankind and deserts follow. The world's tropical forests are eroding at the rate of forty to fifty millions acres per year. Also, grasslands and croplands are being converted into deserts and wastelands
The biological systems of different environments in our planet ,are constantly degrading and depleting with the every passing decades.
The main reason of this depletion or degradation is the human works and interactions with the environment.
Due to the advancement in the field of science and technology ,we are ruthlessly consuming the natural resources without thinking about it's preservation which cause the degradation of our environment as an obvious result.