Energy is a property associated with the objects and substances and is reflected in the changes that occur in nature. The energy is manifested in the physical, for example, by raising an object, transport, deform or heat. The energy is also present in the chemical changes, such as by burning a piece of wood or the decomposition of water by electric current
Body: Discussion and Analysis
Renewable energy is the energy produced by using natural resources that will regenerate in time. Primary sources of renewable energy are water, geothermal heat, wind, and sunlight. The energy produced by using different organic materials, such as wood, agricultural rejects, forestry residues, and urban solid waste (called biomass) is also regarded as “renewable.” According to authoritative international agencies like the United Nations Environment Program and the Intergovernmental Panel on Climate Change, renewable energies represent the most realistic alternative to fossil fuels. At present, renewable sources are employed chiefly in the production of electricity, but also to produce bio fuels and to provide heat for industrial and private users. Over the last 10 years, the development of renewable energies has been stimulated by concern over global warming. At this time, it is believed that renewable energy sources will play a key role in limiting greenhouse gases emissions. (Watson, 2001)
Energy is commonly referred to as the ability to do work; it enhances man's ability to convert raw materials to useful products. Energy is of two forms and sources; namely, renewable and nonrenewable sources of energy. The renewable energy resources are those that are naturally generated and can be obtained from the sun, water, winds, waves, tidal, and other replenishing natural sources. These resources are non depleting, abundantly available, and naturally occurring. The nonrenewable energy resources are those sources that cannot be replenished by natural phenomenon over a short period. They account for over 75 percent of the energy sources used worldwide. Nonrenewable energy sources are those sources that have been formed over many millions of years; they naturally exist and are organic in nature—mostly plants and animals that died millions of years ago and thus have fully decomposed, releasing all their carbon contents back to the Earth and becoming a usable source of useful energy. They emanate from the ground either as liquid (e.g., crude oil), solids (e.g., coal), or gases (e.g., associated and no associated gases) and exist in fixed amount per location. (Kelley, 2008)
The nonrenewable energy resources are of two types: fossil fuels and nuclear fuels. Each of these resources can be used to generate electricity, and they power the majority of today's industrial and domestic processes. . Primary energy refers to natural resources that can be used to provide energy, including human and animal power, wood and other combustible plants, water, wind, coal, oil, natural gas, and nuclear fission or fusion.
Ozone, denoted chemically as O3, is a relatively unstable gas with each molecule containing three atoms of oxygen. In a thermally stratified atmosphere, ozone occurs in the lowest two layers, the troposphere ...