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
Animals that live in jungles include jaguars, ocelots, bushmasters, howler monkeys, crowned eagles, colobus monkeys, tigers, sloth bears, rhinoceroses, elephants, water buffaloes, black eagles, cobras, langur monkeys and tapirs. Because jungles on different continents vary greatly, the wildlife living in them also varies greatly. Many of the animals most closely associated with jungles or tropical rain forests are endangered.Full Answer >
The six segments of the general environment are political, economic, social, technological, environmental and legal. These six external segments influence a company while remaining outside the company's control. The process of examining how each segment can affect a company is known as PESTEL analysis.Full Answer >
The abiotic factors of temperate grasslands include low rainfall, moderate humidity, large temperature differences between winter and summer, seasonal fires and rich nutrients in the soil's upper layers. Temperate zones are regions between the tropics and poles, and abiotic factors are an ecosystem's nonliving parts.Full Answer >
Decomposers help the environment by breaking down large organic molecules into forms that other organisms can use, releasing them into the ground, water and air. They can get energy from organic compounds other species cannot. Without decomposers, many of these compounds would remain unusable and would even obstruct new life.Full Answer >