Abstract Many scientists have been warning people that we cannot continue to use fossil fuels at the current rate. Besides the possibility of running out of these fuels, there is also the negative impact that the use of these fossil fuels has on the Earth's ecosystems, such as global warming. Currently, the major sources of fuel in the world are oil and coal. These are limited resources, which mean that they will not last forever. …showed first 75 words of 1564 total…

…showed last 75 words of 1564 total…is water. It will be hard to switch from one source of energy to another, but we must attempt to or else, we are sure to run out of natural resources. Right now hydrogen-powered cars are so expensive because they aren't selling many hydrogen cars. Also, the process of producing hydrogen is still expensive. As technologies to produce hydrogen improve and more and more people start to buy hydrogen-powered cars, the price will go down.