Hao L asked:


I watched a documentary on hydrogen cars, and am now very interested in the future of cars. Later, however i got into an intense argument with my dad about it; he’s a BIG skeptic. He said that because nothing is 100 percent energy efficient plus we can never truly create energy, simply by putting water into a car would never work! I argued that gasoline, by that logic, wouldn’t make cars run. He said that gasoline is made by enormous amount of energy and can therefore release that energy by simply lighting it. I understand that water, unlike gasoline, is not an energy carrier and to make energy carrier (hydrogen) from requires energy itself. so can hydrogen fuel cell really work?

LUKE

aravinthan asked:


how can we separate hydrogen from air or water and also how hydrogen is used as a fuel

WILFRED

just*a*girl asked:


I just received the following email:

Americans drank 7 BILLION gallons of bottled water in 2004.

To bottle & ship a year’s worth of bottled water to the US companies such as PepsiCo & Danon burns 1.5 MILLION barrels of oil, enough to fuel 100,000 CARS FOR ONE YEAR!!!

90% of plastic bottles end up in landfills where they take 1000 YEARS!! to biodegrade.

Taste and chemical analyses reveal there’s no difference between tap water and bottled water.

Bottled water costs 10,000 times more than tap water -& is more expensive, per gallon, than gasoline!?

The London Independent says that “getting water from the other side of the world & transporting it to sell to the U.S. is ridiculous”.
******

Are there places in America where the water is so bad that bottled water is a necessity?

I would think that a filter on your faucet might take care of any taste problems from well water, would it not?

Or is it just that we Americans are that lazy?
What do you suggest we do?

TERRANCE