When burned, fossil fuels produce heat energy as well as a number of waste products and gas emissions. Fossil fuels are burned to produce the heat used in the generation of electrical power. Oil and natural gas are often refined to produce fuels used in heating and transportation.
Fossil fuels were formed from the remains of plants and animals that lived millions of years ago. These remains were eventually covered by layers of rock. Different types of fossil fuels are formed from organic matter depending on the temperature and pressure they were subject to as well as a number of other factors. Coal, oil and natural gas are considered a non-renewable resource, meaning that there is a limited supply of these fuels.
The combustion of fossil fuels produces a wide range of waste products such as ash, slag and other particulates. Burning fossil fuels also produces carbon dioxide, a greenhouse gas that contributes to global warming. Coal and oil also produce sulfur dioxide when burned, a gas that causes breathing problems for many living creatures and contributes to acid rain. Fossil fuels are a widely-used fuel source that have been responsible for three-quarters of human-caused greenhouse gas emissions over the past two decades.Learn More
Desertification can be slowed or stopped by protecting the native plants in the area, slowing or stopping land use that leads to erosion, and careful use of land for grazing rather than farming. Desertification is most frequently caused by overuse of water resources in an area, combined with the removal of plant matter. Plants are essential to preventing desertification, as they hold the fertile top soil in place.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 >
Pure research, which is also known as basic or fundamental research, is conducted without a specific goal in mind, whereas applied research is carried out with the goal of solving a problem or answering a specific question. Pure research is more exploratory in nature.Full Answer >
Positive gravitropism describes how plant roots grow downward in response to gravity. This characteristic is found in all higher plants, lower plants and other organisms.Full Answer >