The U.S. Environmental Protection Agency describes alternative fuels as those that are used in place of gasoline or diesel. Dozens of alternative fuels exist and new ideas are constantly explored, but the U.S. Department of Energy lists six types of alternative fuel that are already in production or in development as of 2014: biodiesel, electricity, ethanol, hydrogen, natural gas and propane.Know More
According to the U.S. Department of Energy, biodiesel, ethanol, electricity, propane and natural gas are already available in some American markets for use in vehicles. Biodiesel is a renewable fuel source made from vegetable oils, animal fats and cooking grease that would otherwise be considered waste. Ethanol appears as an additive in gasoline to reduce emissions and is made from corn and other plants. Electricity powers plug-in vehicles, as well as hybrids that use a combination of traditional fuel and self-contained electrical generators. Propane and natural gas have long been used as an alternative fuel, but they have seen a resurgence in use for light and medium-duty fleet vehicles, such as police cars and school buses, due to existing delivery infrastructure and reduced emissions.
The U.S. Department of Energy reports that hydrogen is one of the most promising alternative fuels. Hydrogen fuel is potentially emissions-free, leaving only water vapor and oxygen as by-products. As of 2014, hydrogen fuel is not cost-effective enough to allow for widespread use.Learn more about Environmental Science
Some natural environmental factors include: water, wind, fire, earth and the plants and animal living in the area. Humans can also create environmental factors, such as impacts to air and water quality and influences on animal life.Full Answer >
The carbon dioxide and oxygen cycles work through processes that convert carbon in the atmosphere into oxygen and transform oxygen back into carbon dioxide. Plants are the main producers of oxygen through a process called photosynthesis. They use carbon dioxide and sunlight to produce energy and release oxygen into the atmosphere.Full Answer >
According to the National Oceanic and Atmospheric Administration, coral reefs are one of the most diverse and valuable ecosystems on earth. Reefs support more species per unit area than any other marine environment.Full Answer >
It is important to go green because the Earth has limited natural resources, which have to stretch to support all life on the planet. Going green can also have beneficial health and economic side effects.Full Answer >