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
Methods for keeping the environment clean include proper trash disposal, recycling, avoiding disposable products and using renewable energy sources. Other lifestyle changes that benefit the environment include taking public transportation and buying organic foods.Full Answer >
Biotic factors in a forest ecosystem are living things that are necessary to ensure that life is sustained within the forest. The word biotic is translated to mean "things that have life" or "living things."Full Answer >
In addition to overtaking and replacing native plants in an ecosystem, kudzu can alter the nitrogen balance of the soil and release dangerous ozone into the atmosphere. The vines also release volatile organic compounds into the air that can exacerbate smog when combined with other particulate pollutants. Kudzu's root systems can also drain an ecosystem of available water, leaving the few plants that survive its presence parched and dying.Full Answer >
Giant pandas are becoming extinct due to extensive habitat loss and destruction by hunters. Habitat loss destroys bamboo, which is the giant panda's sole food source. It also isolates pandas causing a reduction in the rate that mating and reproduction occurs. Poachers kill only a few pandas each year, but hunters of other animals in the area accidentally kill pandas on a more regular basis further reducing their numbers.Full Answer >