T.+Glenn+Energy+and+Water+Wiki

1. When combusted, gasoline releases carbon dioxide (CO2) into the atmosphere (a relatively small amount, but present nonetheless), which is a greenhouse gas. Greenhouse gases are called such because solar energy can pass through it coming towards earth, but it's too weak to escape it once it reflects off of the planet's surface, trapping the energy here and making the global temperatures rise. When people buy larger vehicles to drive, they are exerting more CO2 into the atmosphere causing more greenhouse gases. Greenhouse gases are not what we want in our atmosphere, but driving gas powered cars only add to the devastation of the greenhouse effect. The majority of people still don't understand that this gas can NEVER leave. That we can never get rid of it. As long as they are satisfied, all is well only until they discover that their own planet is going down the drain!

2.The ozone layer is less than a centimeter thick, and essentially stops UV radiation from becoming too dangerous. It was being eaten by CFC's (chlorofluorocarbons) when we still had them in aerosols, but that isn't much of a problem anymore ; the main issue is that the damage is basically irreversible, and a lot of other countries still use CFC's. And yes, the damage would be alleviated slightly if we stopped using gasoline. Although, if we do not find an alternative to gasoline, than the output of CFC's from us, humans, will destroy, if not most, than ALL of the o-zone molecules.

3. Solar Power certainly doesn't have any gaseous emissions; It offers a clean source of energy, though it's still rather expensive to make. It essentially works by using 'photovoltaic' cells that convert sunlight into electricity. A lot of their efficiency is dependent on the architecture they're arranged in, and they're reliant on silicon, not the most common element.

All in all, it's currently not used much (less than 1 percent the world's total, I think), but it's an interesting prospect for the future. And where would calculators be without them?