Research out of the UK indicates that the "noise pollution" you keep complaining about may be all in your head. Or, more accurately, in your ear.

Tinnitus -- a medical term referring to any noise heard in the ears or head -- affects 4.7 million in the UK, and a recent study finds that at least 25% sufferers originally assumed the noise they heard was coming from an exterior source. This misjudgment may be hindering those affected from seeking assessment and treatment.

While there is no cure for the condition, doctors are able to change the way your body responds to the noise -- making you less aware of it -- or use therapy to distract you from the persistent buzzing or ringing.

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We all know that SUVs and Hummers are bad for the environment. They use lots of gas and pollute our cities. But there is a much worse polluter right in the garage. The lawn mower.

Gasoline lawn mowers, being two-cycle engines, pump 93 times more pollution per gallon of gas than any car or truck, according to the Journal of Environmental Science and Technology, a publication of the American Chemical Society. Also, lawn mowers have no catalytic converter, so the pollution is not reduced like it is on an automobile.

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