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. They are also expensive, because there is no commonly available alternative at this time. In addition to this, they are also polluting the environment and are…
