The planets in our solar system is categorized in two parts, terrestrial the inner planets and Jovian the outer planets. Terrestrial planets are four planets which are closest to the sun, such as Mercury, Venus, Earth and Mars. According to their shapes and structure the terrestrial planets also known as rocky planets and they have roughly the same structure and shape, as a result these planets can be simplified to a central metallic core and an outer silicate rock mantle. In addition to these...
What is Water Crisis ? Water crisis is a term used to refer to the lack of drinking water in the world for the human beings. As the worlds population will increase, the usage of water will also increase, therefore more safe water will be needed for the population. Eight hundred and eighty four people lack access to safe water and 3.575 million people die each year from water-related diseases. One of the most important compound which is most essential to our life is water which is an inorganic...
In today's world there are various ways of producing energy. In the past most of the energy came from fossil fuels; fossil fuels were always used to produce energy because they were cheap and available in vast amounts. Nowadays, because of the limited amount of fossil fuels around the world and the high prices people have started to utilize other ways of producing energy. Nuclear power is one of the many resources now being used in order to keep the use of fossil fuel's down. In this paper I...
Land and water are fundamental natural resources for mankind. The demand for food, fiber and housing is increasing with the continuous rise in the world's population. Food production is largely reliant on land and water resources. More than 90 percent of rice and 43 per cent of wheat in the world is produced and consumed in Asia. The introduction of new varieties and chemical fertilizers, during the green revolution of the 1960s, resulted in increase in crop yields. But, severe cultivation,...
The introduction of hydrogen into an energy system requires substantial changes and investments of infrastructure. Most publications agree that this is the main barrier to the development of hydrogen as an energy carrier. Hydrogen used in HFCVs can be produced in a centralised production plant or a decentralised on-site station. Hydrogen from the former can be distributed via pipelines, liquid hydrogen tank trucks, etc [39]. Fig. 3-14 exhibits the most possible ways to produce, distribute,...
Essay: "Critically evaluate the likelihood and potential impacts of the Earth System crossing a climate tipping point within the 21st century." Introduction Climate change have been in evidence since scientists predict that, if no counteraction is planned and put into practice, we might be affected by catastrophic changes in climate patterns. According to the IPCC (2001a), climate change is the effect on the Earth's climate state, and its atmospheric composition, csaused by an...
According to Anderson, 2000 the importance of systematic method of assessing environmental impact of a project has been recognised for many years, but the idea was initially introduced as a means to accomplish this in the 1970's. Ever since, the use of environmental impact assessment (EIA) have been used in many parts of the world and the techniques has been developed and adapted to various purposes connected to decision making at different levels in enterprises and society. However to...
Long-term GHG and local pollutants reduction The project will result in generation of power of 14,000 MWh at an annual 80% plant capacity utilization factor using sustainably produced fuelwood. This will displace an equivalent volume of electricity that would otherwise be generated by fossil fuel based thermal power plants and fed into the Sri Lanka national grid. According to the long- term generation plan of the CEB, electricity demand is growing at an average annual rate of 7 - 8%. Due to...
Geoarchaeology has become a very important field of study, by using the techniques of Geosciences in combination with archaeological research to discover and understand more about human prehistory (Waters, 1992). Geoarchaeology is an important field of study in the Arabian Gulf region and continues to improve the interpretation of human prehistory and the impacts humans have had on the Holocene landscape. Combining Geoscience techniques with climate proxy data and archaeological research,...
Lotic systems comprising of streams and rivers flow through the landscape carving distinctly formed geomorphological features and entraining nutrients, organic matter and sediments. The dynamic nature of river systems has been described with several concepts. A dominant concept used by fluvial geomorphologists is the River Continuum Concept, which describes the continuous gradient of physical conditions and variables from headwaters to mouth (Vannote et al., 1980). The concept depicts river...