This increase is caused more by increased photosynthesis than by a reduction of water loss through partially closed stomata. Thus, more biomass can be produced per unit of water, although a crop would still require almost as much water from sowing to final harvest. If temperature rises, however, the increased WUE caused by the CO2 fertilization effect could be diminished or negated, unless planting date can be changed to more favourable seasons. As the world continues to consume more fossil fuels, concentrations of CO2 will continue to increase. Other greenhouse-effect gases, such as CH4, NO2 and CFCs substitute,perhaps tropospheric ozone, will likely expand also.
Introduction Are plants considered to be cooler than humans? Well plants have developed a smarter, cleaner and cheaper way to produce energy. This method is known as photosynthesis which simply converts sunlight, carbon dioxide and water into usable energy (carbohydrates) and oxygen (which is released). Although humans have a variety of energy sources, such as fossil fuels and wind turbines, most of these methods are expensive and harmful. For instance, the burning of fossil fuels increased the amount of carbon dioxide in the atmosphere which contributed to global warming.
The project life span was found that it would reduces 450 000 tons of carbon dioxide per annum over a 10 year period. The project is a waste management project. Exxaro has another waste management project which was approved and registered in 2012. The projects objective is to use furnace off-gas from the closed ferrochrome furnaces to generate electricity. The electricity will be used by Samancor Chrome and will reduce the demand for Eskom generated electricity.
Introduction Perhaps let’s first ask ourselves what is Global warming? Global warming is an increase, on a long-term, of the average temperature on earth. It is generally due to an increased concentration of greenhouse gases in the atmosphere, mostly caused by human activities. ‘The emissions of greenhouse gases on our planet has increased by 70% from 1970 to 2004’ says Couroche Kalantary, a reporter for Global Majority E Journal. (I quote him as he is said to be a reliable source by some major American universities).
Nuclear energy has the possibility of immense power generation in a clean and profitable way, as nuclear fusion becomes a more well known subject. Nuclear fusion, which is the opposite of nuclear fission, is the way the sun produces energy and if harnessed will be the most efficient and largest energy producer in the world. It would grant humans almost unlimited amounts of energy to be used to further the research in nuclear fusion. This process has been investigated and learned about since the 1940s and 1950s almost since the start of nuclear fission and has continued to be a topic of investigation as nuclear fusion reactors are being built right now (“Fusion Energy”). These projects have been funded with billions of dollars and may come to fruition in the near future providing humanity with nearly unlimited energy.
Global warming is the rise of earth’s global temperature caused by the over release of greenhouse The solution for global warming gases. Greenhouse gases are gases the are be able to absorb infrared radiation in earth’s atmosphere. With an imbalance greenhouse gases in the atmosphere, the earth is becoming warmer and warmer. As the main effector of the greenhouse effect, CO2 has played the most important role in the global warming. Humanmade CO2 continues to increase above levels not seen in thousands of years.
Greenhouse gases are needed for the existence of life. A part of the solar radiation is absorbed by greenhouse gases, heating them and emitting infrared radiation to the ground . Τhat is the reason that temperature on earth is about 15C Without greenhouse gases the temperature on earth would be -180C. The problem lies in the increasing of concentration of greenhouse gases. During the last century the average temperature of the Earth increased by 0.8 Celsius degrees.
Solar energy is one of most important renewable energy sources that have been gaining increased attention in recent years. Solar energy are plentiful it has the greatest availability compared to other energy sources. The amount of 20% solar energy supplied in the earth. The sun are sufficient to power the total energy needs of the earth for one year .The conversion of solar energy into electrical energy has many application fields. Residential, space and aircraft and naval applications are the main fields of solar energy.
This helps to improve engine lubrication and rises engines lifetime since it is almost sulphur free. The second advantage is biodiesel is better fuel economy. Vehicles that run on biodiesel achieve 30% fuel economy compare to petroleum based diesel engines. Thus, vehicles that uses biodiesel will help people to have fewer trips to gas stations and able to run more miles per gallon. The third advantage is biodiesel is produced from renewable resources.
1.1 INTRODUCTION: Solar energy has the greatest potential of all the sources of renewable energy. If only a small amount of this form of energy could be used, it will be one of the most important supplies of energy specially when other sources in the country have depleted energy comes to the earth from the sun. This energy keeps the temperature of the earth above than in colder space, causes current in the atmosphere and in ocean. It causes the water cycle and generates photosynthesis in plants. The solar power where sun hits atmosphere is 1017 W. The solar power on the surface of earth is 1016W.