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Urban Myth: Suncream shouldnt be used from year to year, or hype put about by the manufacturers?

I've just come to clear out the bathroom cabinet and there must be nearly a dozen different suncreams, where the wife has insisted that it shouldnt be used from year to year, and where I've said that in my experience it doesnt matter and its the manufacturers who probably started this rumour to make you buy new every year.

Does anyone know if there are active ingredients in your normal sun cream that reduce their effectiveness with age?

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Asked by chuckle69
on 2010-11-25 14:00:00

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Categories: Environment.

Tags: humanbody, Sunburn.

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What are the total environmental costs of the various types of wine bottle closures? Wine bottles may be closed with corks, rubber stoppers, plastic stoppers or metal screw caps. For the wine, the screw caps appear to be preferable as the wine does not taint. What are the total environmental costs of the variuous methods, ie which is preferable from an enviromental standpoint?
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Asked by jeremyroberts
on 2010-11-23 12:48:42

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Categories: Environment.

Tags: Environmentalcosts, Winebottleclosures.

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Is the Tryptophan in turkey really responsible for making us feel sleepy at Thanksgving? What's the real deal here? I heard there is more trypotphan in a chicken breast than there is in a whole turkey.
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Asked by 4wDr
on 2010-11-23 02:24:10

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Categories: Environment.

Tags: animals, humanbody, environment.

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How deep a layer of plastic bottles would I need to get an insulation R value of 5? The insulation in my roof is made from plastic bottles with an R value of 5. Leaving aside the inconvenience, what depth of (empty) plastic bottles would I need to produce the same level of insulation? Would the bottles need to be the same size and arranged, or could they just be thrown in randomly?
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Asked by claretrinder
on 2010-11-19 08:56:34

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Categories: Environment.

Tags: Energyconservation, recycling.

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Too much nitrogen in Environment ? What is the reason having 72 % (I guess) Nitorgen in our environment ? What incident turned having it on perfect balance in ecosystem ?
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Asked by vivekbelkonikar2010
on 2010-11-17 01:29:50

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Categories: Environment.

Tags: weather, Earth, environment, nitrogen.

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if you released a buoyancy aid from the botom of the deepest ocean would it float or would the water presure hold it down?
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Asked by canivet290468
on 2010-11-16 22:02:20

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Categories: Environment.

Tags: deepocean.

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What is the daily cost of US oil imports in dollars I work with an American who scoffs at renewable and green energy and i would like be able to tell him how much money his country sends abroad each day to pay for its oil fix and how much of it goes to what he would consider hostile states.
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Asked by jacuzzi9mm
on 2010-11-15 07:33:11

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Categories: Environment.

Tags: oil, deficit, imports.

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A lawn-mower pollutes like ten cars!

I read on the US Environment Protection Agency website, that using a petrol lawn mower produces more carbon dioxide in an hour than a car produces whilst covering 300 miles. I had assumed that, when burning petrol, all of the carbon combines with oxygen in the air so the co2 produced varies in proportion to the amount of fuel burnt? What have I missed?

Simon Forbes

Hove

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Asked by lordforbes
on 2010-11-12 13:30:03

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Categories: Environment.

Tags: science, engineering, Ecology.

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Why we have smaller ground surface than ocean? Why Earth has Larger ocean surface area than ground ?
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Asked by vivekbelkonikar2010
on 2010-11-10 21:49:58

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Categories: Environment.

Tags: weather, Earth, Planets, Surface.

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If you fall and break your neck and back - do you know you are dead? I want to know if my Dad had any last thoughts..... Its been 2 years and I'm not going to be upset - I just need to know. Thanks!
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