exam question 3 renewable/nonrenewable resources

Renewable resources are resources that can either be produced quickly and in infinite quantities, or never runs out. These are things such as the sun, wind, and biomass. Nonrenewable resources are found in the earth and either take millions of years to regenerate, or can never be recovered.
Throughout different earth systems, energy sources can change to different forms. For example, hydro energy is based on water, which can be in different states. Some sources of energy such as this can only be used in one form.
Humans have many choices in which kinds of energy they can use. Renewable resources are usually more environmentally friendly, but can cost a lot to harvest. Nonrenewable resources are more easily obtained, but can be harmful to the environment. Eventually all the nonrenewable resources will be used up and people will have to look elsewhere (renewable resources) for energy.
Using nonrenewable resources such as coal, petroleum, and other such fossil fuels should not be used in such excess as it is. These sources of energy are easy to obtain, but are harmful to the environment. The only good thing about fossil fuels is that they are relatively cheap. I believe that the use of fossil fuels should be reduced and we should shift more towards the use of more efficient and environmentally safe sources of energy
I think that the two most logical kinds of energy to use would be solar energy and wind energy.
Solar energy is obtained by converting the suns rays into energy through the use of photovoltaic cells. These capture light from the sun and convert it into energy that can be used for heating, cooking, and electricity. Solar energy can also be stored and used at a later time (at night). (http://en.wikipedia.org/wiki/Solar_power) This would be a very clean, cheap, and environmentally friendly way to produce energy. The only costly part would be to build solar panels large enough to produce energy for a significant number of people, but after that expense was taken care of, we would have a great source of energy.
Another good source of energy would be wind energy. It is very clean and can produce much energy in the right conditions. However, wind energy would only be logocal to use in windy areas. The initail cost of building turbines and generators to harvest wind energy could be quite expensive, but if they were built in the right areas, the turbines would be very beneficial and produce much energy. (http://en.wikipedia.org/wiki/Wind_energy) However, I still believe that solar energy will be the main energy of the future.