What are some sources of electricity?
If you have a sea current, you can produce electric.
Biomass is also en energy source. Bioethanol is a fuel that is used in Brazil. Biodieses can be produced from vegetable oils, animal fats, or restaurant greases. It is a renewable energy source.
Although it is not renewable, some countries use coal-fired power plants to produce electric.
Some countries use natural gas type power plants to produce electricity. Natural gas is cleaner (compared to coal).