A lactic acid test is a blood test that measures the level of lactic acid made in the body. Most of it is made by muscle tissue and red blood cells.
A biofuel is a fuel that is produced through contemporary biological processes, such as agriculture and anaerobic digestion, rather than a fuel produced by geological processes such as those involved in the formation of fossil fuels, such as coal and petroleum, from prehistoric biological matter.
Biofuels are fuels that are made from plants and can be used to power cars or other vehicles. 1  Pros: When biomass is alive, it removes harmful carbon dioxide from the atmosphere. 2  Cons: Using biomass energy often releases carbon dioxide and pollutants into the air.