Has anyone ever calculated how much C02 is released into the atmosphere via carbonated drinks? There are very few places left where one cannot buy a can of soda, and we know that global production of fizzy drinks is considerable. Does that translate into significant amounts of C02 release, both in terms of the dissolved gas in the drink itself and the manufacture and transport of same?

Would like to know if there is a formula for purifying water with the scallop shells or is this experiment still in progress?

Here's a question related to the review of An Inconvenient Truth. The associated website www.climatechange.net says that a tree will absorb a ton of CO2 over it's lifetime. Is there anything that absorbs more or at a faster rate?

I have noticed that every August, hundreds of sparrows in my neighbourhood congregate in a half dozen trees nearby, every evening for one to two weeks. The noise they make is tremendous! What are they doing?

Both my husband and now my son sneeze a few times when they step out into bright sunlight. What causes this?

I have noticed that I can see the moon during the day sometimes, but not all the time. What factors are at work here? The season? The time of day?