what is the meaning of locomotion

The practical options for energy range from the standard fuels, natural gas, petroleum (or oil), and coal. Fossil fuels are referred to as nonrenewable energy sources because, once used, they are gone. Scientists are exploring the practicality of other sources called renewable energizes. These include sun, wind, geothermal, water, and biomass. The renewable power resources are very important in long range energy planning simply because they will not be depleted. Those that support animal testing claim that is a necessary practice. They explain that businesses that rely on animal testing do use humane ways to feed, house and care for the animals. Supporters also claim that alternatives to animal testing aren't as far reaching, lacking the opportunity to figure out how cosmetic products affect living tissue and organs.