NEET Questions Solved

AIIMS - 2012

Cattle ranches are known to causes acute green house effect. This is due to
(a) mechanized milking practices
(b) methanogenic bacteria in rumen
(c) decomposition of left over fodder
(d) decomposition of organic remains in faeces.


(b) : Cattle ranching refers to practice of raising grazing livestock such as cattle or sheep for meat and wool, etc. The area of landscape meant primarily for cattle ranching is called a ranch. The practice has lead to accelerated deforestation and contributed to increased methane gas concentration in atmosphere. Whatever cattle eat; is subjected to the action of methanogens (bacteria) harbouring the stomach (rumen) of cattle. The action of these bacteria on food material produces methane gas which is released through cattle fart into the earth's almosphere where it absorbs heat just like carbon dioxide, contributing to global warming

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