The problem comes with the carbon-altering activities that humans take part in, such as the burning of fossil fuels and other biomass, which puts more carbon into the atmosphere, causing the greenhouse effect.
This includes such resources as biomass, fuel cells, hydro, solar, wind, tidal waves and thermal forms of harnessing the earth's natural elements.
According to Midwest ISO (Midwest Independent Transmission System Operator, Inc.), the Midwest offers three primary sources of renewable energy: biomass, hydro and wind.
Biomass is any organic material produced by animals and plants, such as crops, wood, manure, municipal solid waste, ethanol, methane, and biodiesel.
Bioenergy: Bioenergy, or biomass, is the energy created when something burns, typically plant material, although solid waste can be burned, too.
Other natural resources that are being explored for their renewable potential include timber, fresh water, geothermal energy and biomass.
Types of renewable energy include hydropower, geothermal energy, wind energy, solar energy, biomass, tidal energy, and hydrogen energy.
However, some contend that biomass plants may lead to higher outputs of greenhouse gases, which would actually harm the environment.
Therefore energy sources that are grown such as wood and biomass or derived from the weather or nature are completely renewable.
According to the EIA, biomass fuels currently provide approximately 4 percent of all energy used in the United States.