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  Scientists try to stop cows' bottoms smelling
Updated 28 February 2003, 19.55
Cows are too whiffy
Scientists have been given the tough job of making grass-chomping cows less whiffy.

One dairy cow gives off enough methane gas in a single day to fill around 400 empty litre bottles of pop, which is really bad for the environment.

Once it's left the cow, all that methane gas goes up into the atmosphere and makes the hole in the ozone layer bigger, making global warming worse.

Beans: probably not for cows
Beans: probably not for cows
The cows also lose energy every time they let one go, so it's important for them as well as the environment.

Apart from the obvious - don't feed baked beans to cows - the scientists have worked out a special mixture to give the cows to make them smell sweeter.

They've been given a big pile of money to make sure it all works, and will be hoping for a pat on the back at the end of the project.

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