cows upper front teeth - number of cattle in India - cows release hydrocarbon mostly by burping
Although a cow has no upper front teeth, it grazes up to 8 hours a day, taking in about 45 kg (100 lb) of feed and the equivalent of a bath tub full of water. A healthy cow gives about 200,000 glasses of milk in her lifetime.


A cow has four stomachs: the rumen, reticulum, omasum and abomasum. The rumen is the largest stomach and acts as a fermentation chamber. The abomasum is last of the four and is comparable in both structure and function to the human stomach.


With all its grazing and many stomachs, it is no wonder that cows are one of the main contributors to the hole in the ozone layer. Apart from CFC, the biggest culprit is hydrocarbon emissions from cars and cows. Yes, cows! Cows release some 100 million tons of hydrocarbon annually - by releasing gas. To give you an idea of how much gas a cow emits: if the gas of 10 cows could be captured, it would provide heating for a small house for a year.


But unlike what you think, cows release hydrocarbon mostly by burping.


Cow factoids


The average lifespan of a cow is 7 years. The oldest cow ever recorded was Big Bertha. She reached 48 in 1993. She also holds the record for producing 39 calves.
There are more than a billion cattle in the world, about 200 million in India.
Twelve cows are known as a "flink."


Cows and global warming


Video take on cow flatulence, sheep burps and global warming

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