Krishnan's Blog

Measurements of temperature taken by instruments all over the world, on land and at sea have revealed that during the 20th century the Earth’s surface and lowest part of the atmosphere warmed up on average by about 0.6°C. During this period, man-made emissions of greenhouse gases, including carbon dioxide, methane and nitrous oxide have increased, largely as a result of the burning of fossil fuels for energy and transportation, and land use changes including deforestation for agriculture. In the last 20 years, concern has grown that these two phenomena are, at least in part, associated with each other. That is to say, global warming is now considered most probably to be due to the increases in greenhouse gas emissions and concurrent increases in atmospheric greenhouse gas concentrations, which have enhanced the Earth's natural greenhouse effect. Whilst other natural causes of climate change can cause global climate to change over similar periods of time, computer models demonstrate...

Measurements of temperature taken by instruments all over the world, on land and at sea have revealed that during the 20 th century the Earth’s surface and lowest part of the atmosphere warmed up on average by about 0.6°C. During this period, man-made emissions of greenhouse gases , including carbon dioxide , methane and nitrous oxide have increased, largely as a result of the burning of fossil fuels for energy and transportation, and land use changes including deforestation for agriculture. In the last 20 years, concern has grown that these two phenomena are, at least in part, associated with each other. That is to say, global warming is now considered most probably to be due to the increases in greenhouse gas emissions and concurrent increases in atmospheric greenhouse gas concentrations , which have enhanced the Earth's natural greenhouse effect . Whilst other natural causes of climate change can cause global climate to change over similar periods of time, computer mod...

Climate change has potential risks for the British Isles. Most critical of these risks is an increase in frequency and intensity of extreme weather such as hot spells, drought and storms. Accompanying a projected rise in average surface temperature of between 0.9 and 2.4°C by 2050 will be the increased occurrence of hot, dry summers, particularly in the southeast. Mild wet winters are expected to occur more often by the middle of the 21 st century , especially in the northwest, but the chance of extreme winter freezing should diminish. Higher temperatures may reduce the water -holding capacity of soils and increase the likelihood of soil moisture deficits, particularly if precipitation does not increase as well. These changes would have a major effect on the types of crops , trees or other vegetation that the soils can support. The stability of building foundations and other structures, especially in central, eastern and southern England, where clay soils with a large shrink-swe...

Carbon dioxide (CO 2 ) is a colourless, odourless gas consisting of molecules of two oxygen atoms and one carbon atom. Carbon dioxide is produced when any form of carbon or almost any carbon compound is burned in an excess of oxygen. For example, it is released into the atmosphere during natural forest fires and the man-made combustion of fossil fuels . Other natural sources of carbon dioxide include volcanic eruptions, decay of dead plant and animal matter, evaporation from the oceans and respiration (breathing). Carbon dioxide is removed from the atmosphere by carbon dioxide "sinks". The main removal processes are absorption by seawater, and utilisation (for photosynthesis) by ocean-dwelling plankton and land-dwelling biomass, including forests and grasslands. Through Earth history the amount of carbon dioxide in the atmosphere has varied significantly. The Earth's early atmosphere was probably composed mostly of carbon dioxide. At that time, the natural greenhouse e...

Everyone contributes to global emissions of greenhouse gases , but it is not only governments which can take action to reduce the threat of global warming. We all use energy for heating our homes, running electrical appliances, cooking food and driving our cars. Most of this energy comes from the burning of fossil fuels , such as oil, coal and gas, which release carbon dioxide , the main greenhouse gas, into the atmosphere. Despite uncertainties, the general scientific consensus is that increased levels of greenhouse gases as a result of mankind's activities are enhancing the Earth's natural greenhouse effect and causing global warming. Energy use is responsible for about 75% of man-made carbon dioxide emissions. Therefore, it is important to try to reduce our dependence on fossil fuels and reduce energy consumption. Energy used in the home can be saved by a number of measures, including draught proofing, insulation, and using energy efficient lighting and other household ...

Computers, networking and internet have certainly changed our lives and they way we work. In the 21 st century 99% of the offices have all the above mentioned three great inventions. Every office uses computers networked to each other and also connected to the internet. Every office uses one or more servers for e-mails, hosting websites, FTPs, backups, storage the list goes on and on. No office can function without these boons of technology. Even my office has all these and it helps us function better. But these inventions are destroying our environment. So what can we do, so that our environment is not harmed from the energy that our offices consume. The office complexes use a lot of energy there by inc reasing the energy consumption, which is directly proportional to the burning of fossil fuels (coal). So does that mean, our earth has to die in the hands of technology? Certainly not. The wise usage of electricity in offices can certainly reduce the green house e...

Hansen is director of the Goddard Institute of Space Studies at NASA . Hansen is on of first scientists that warm people about global warming in the 1980. He said if web (human) still produce CO2 will make disaster to our world. By using coal and other fossil fuel , this will increase CO2 concentration on our atmosphere from 385 to 600 parts per million (ppm) in the next 10 year. Major scientists will say that cause of global warming is because human produce CO2, but not for Roy W. Spencer, a research scientist at the University of Alabama in Huntsville. But Spencer views are not shared by most science, including the Intergovernmental Panel on Climate Change , a multinational panel that released updated conclusions about human produced global warming and its risks last year. How To Reduce CO2 Emissions Hansen has some idea and solution for this : 1. Postpone building new coal fired power plant unless they have carbon sequestration technology. 2. Phasing out the use of coal fire ...

Currently, Earth temperatures continue to rise, occurred Anomalies season and the weather extreme. Polar ice melt, and threatening Hurricane. Ozone hole yawn, the World is on real crisis. Natural disaster, anywhere, Mostly because we RADIO (Human). Progress of Science and Technology is not all good for us. One is global warming. Himalaya glacier as eternal snow bank, is one of the most suffering as a result of global warming. Fourteen Peak - One of Mount Everest - the Tibetan plateau that met all ice. Ice on Himalayas hundred times more than the Highlands Alpen (Europe). Seven of the River of Asia that there disgorge (River Yellow River, Yangtze River, Mekong River, Salween River, Brahmaputera, Gangga River, and the Indus River) produce for more than half a source of water Drinks for 40% of the population of Earth. If Glester it disappeared, Say 25 years in the future, then the 2.6 billion people will lose the source of drinking water. What will we leave Heritage misery for our c...

Perhaps many people do not know much about the impact of pollution from LCD (Liquid Crystal Display) television. From the results of the research scientist Michael Prather, from New Scientist, a service that focuses on science and technology news, that chemicals used to make LCD televisions and semi-conductor global warming could cause more fuel than coal. Trifluorida nitrogen ( NF3 ) is a “ greenhouse gas that is not visible,” based on research from the journal entitled “ Geophysical Research Letters ” on 26 last June. Nitrogen Trifluorida used in making chemical smoke, which can create a layer lquid Crystal, semi-conductor and synthetic diamonds. Prather estimates that the results of chemical production will be increased to 8,000 metric tons in 2009. Meanwhile, global warming from Nitrogen Trifluorida will result in 17,000 times stronger than the effect karbondiaosida (CO2). Not only NF3 and the carbon dioxide that can improve the quality of global warming. According to the Kyoto ...