Introduction Solid waste management is actually becoming an alarming concern for local governments and private companies providing waste management services. The methods used impact directly three main aspects, that is, our health, economy and environment [1].Therefore, the importance of sustainable solutions particularly in developing countries where the population rate and the infrastructure are rapidly increasing rises from the generation at source to the final disposal of solid waste. The...
The climate has changed massively during the twentieth century. The recent statistics from the NOAA'S Office showed that the temperature of the earth has risen up about 1.00.4℃ since the late 19th century (IPCC,2001), These striking statistics showed people that human beings should attach importance to climate change. Generally, the research illustrated that in most region of the world the temperature is warming up, except the Antarctic ozone which is cooling down every...
Africa is a very large continent with extremely wide range of soils (Bationo et al., 2006). The soils range from shallow with meager life-sustaining capacities to deeply weathered profiles that recycle and support large biomass. In many parts of Africa, inappropriate land use, poor management and lack of inputs have led to soil erosion, salinization and loss of vegetation resulting in a decline of agricultural productivity (Bationo et al., 2006). In Africa and particularly Southern Africa, the...
Global warming is the temperature rising of the earth, and it happens because of the greenhouse effect. The greenhouse effect is when carbon dioxide and other gases like "methane" is trap in the atmosphere. Global warming has created many threats to our environments and even the health of human. Global warming causes the climate to change; therefore, it increases the risk of natural disasters. There are also other issues relating to global warming, like deforestation and air...
During the rise of Western Europe in the 18th century, the dominant theme of that era was Industrial Revolution. It was an era that revolutionised Western economies, socio-economic thoughts and contributed to the creation of the term economies of scale in the Western hemisphere. The 'green' theme now appears increasingly in every segment of most economies in the world giving rise to a Green Culture which has led to serious questions on our current lifestyle and the need for direct and indirect...
Both gasification and incineration are capable of converting hydrocarbon-based hazardous materials to simple, nonhazardous byproducts (Source : U.S. Department of Energy March 30, 2000), but gasification can be seen to be more beneficial for many reasons. The process as a whole uses less oxygen than conventional incineration meaning that fewer air emissions may be produced containing potential pollutants. It also means less carbon dioxide is produced potentially meaning less impact on global...
Combustion of coal, a traditional method, may no longer be suitable for generating electricity in Hong Kong's future. Serious air pollution that is harmful to Hong Kong people's lives and the decreasing supply of resources that does not meet the heavy demand on energy are two crucial reasons. These problems raised from the coal combustion imply that an alternative technology is necessary. Thus, this essay will look at a new application - Integrated Gasification Combined Cycle (IGCC). The...
Nuclear technique is being an important application in many sectors such as food agriculture, industry, medical, environmental protection and power production. It is known that there are both advantages and disadvantages of using nuclear energy. However, nuclear energy is being widely used in agriculture which includes food production, animal production, crop production, fertilizer, soil fertility and more. According to Farm Press, nuclear power is considered cheap to be used in agriculture...
Global warming is an environmental problem caused due to the increase in temperature of the surface air of the earth and oceans. Increase in the temperature observed from the mid of the 20th century. It has been caused due to the increasing volume of the greenhouse gases which is due to the result of the human activity like deforestation. The ocean is a carbon sink and holding fifty percentages more carbon than atmosphere. The large amount of the waste material releasing from industry affects...
Galaxies are the group of stars. There are more than million galaxies in the universe. Milky Way is an important galaxy in the Universe, because our earth is a part of this galaxy. Among all the planets the earth has all the components for life. All the living organisms in the earth are depending on the nature except human being. To lead his life man is destroying the nature and it ends with Global warming. On the whole the earth is a coolest planet, if the earth is so cool no one can live in...