Climate change
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Climate changes in global average temperature of existing data, by 2100 approximately 1.5 to 6 degrees. Climate change is a natural thing, but people will speed up the deed. Many sceptics doubt the human contribution to this issue and they completely deny the so-called "hockey stick" graph-existence. But people are contributing to the climate, because people also develops industry is evolving and so are also developing carbon dioxide emissions. Anthropogenic factors are human activities that change the environment. In some cases the chain of causality of human influence on the climate is direct and unambiguous (for example, the effects of irrigation on local humidity), while in other instances it is less clear. Various hypotheses for human-induced climate change have been argued for many years. Presently the scientific consensus on climate change is that human activity is very likely the cause for the rapid increase in global average temperatures over the past several decades. Consequently, the debate has largely shifted onto ways to reduce further human impact and to find ways to adapt to change that has already occurred. Of most concern in these anthropogenic factors is the increase in CO2 levels due to emissions from fossil fuel combustion, followed by aerosols (particulate matter in the atmosphere) and cement manufacture. Other factors, including land use, ozone depletion, animal agriculture and deforestation, are also of concern in the roles they play - both separately and in conjunction with other factors - in affecting climate, microclimate, and measures of climate variables. The ocean is a fundamental part of the climate system. Short-term fluctuations (years to a few decades) such as the El Niño–Southern Oscillation, the Pacific decadal oscillation, the North Atlantic oscillation, and the Arctic oscillation, represent climate variability rather than climate change. On longer time scales, alterations to ocean processes such as thermohaline circulation play a key role in redistributing heat by carrying out a very slow and extremely deep movement of water, and the long-term redistribution of heat in the world's oceans. The planet has its own method of correcting rich carbon dioxide concentrations. The more carbon dioxide, the more erosion will accelerate, increasing the emergence of limestone, which in turn binds to itself carbon dioxide, reducing carbon dioxide emissions. However, this will take millions of years, so people have to reduce carbon dioxide emissions. In order to achieve the objectives required under the Kyoto agreement, also, these ‘‘large’’ countries, namely China, USA and Russia. When we get these countries on this project we could delay the effects of the climate change.   |
Toimittaja(t): Jere ja Rami
Luotu: 9.9.2010 13:57
Muokattu: 16.9.2010 14:08