essay on greenhouse effect and global warming pdf

Essay On Greenhouse Effect And Global Warming Pdf

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Climate change mitigation consists of actions to limit global warming and its related effects.

Greenhouse gases from human activities are the most significant driver of observed climate change since the mid th century. As greenhouse gas emissions from human activities increase, they build up in the atmosphere and warm the climate, leading to many other changes around the world—in the atmosphere, on land, and in the oceans. The indicators in other chapters of this report illustrate many of these changes. These changes have both positive and negative effects on people, society, and the environment—including plants and animals. Because many of the major greenhouse gases stay in the atmosphere for tens to hundreds of years after being released, their warming effects on the climate persist over a long time and can therefore affect both present and future generations.

Causes and greenhouse effect

Of those gases, known as greenhouse gases , water vapour has the largest effect. The origins of the term greenhouse effect are unclear. Fourier, however, neither used the term greenhouse effect nor credited atmospheric gases with keeping Earth warm. This radiation, unlike visible light, tends to be absorbed by the greenhouse gases in the atmosphere, raising its temperature. Despite its name, the greenhouse effect is different from the warming in a greenhouse , where panes of glass transmit visible sunlight but hold heat inside the building by trapping warmed air. Although the greenhouse effect is a naturally occurring phenomenon, it is possible that the effect could be intensified by the emission of greenhouse gases into the atmosphere as the result of human activity. From the beginning of the Industrial Revolution through the end of the 20th century, the amount of carbon dioxide in the atmosphere increased by roughly 30 percent and the amount of methane more than doubled.

Global climate change is now widely recognised as one of the foremost — perhaps the foremost — environmental challenge of the 21 st century. The evidence for human influence on climate change through emissions of greenhouse gases mainly carbon dioxide from fossil fuel burning, and methane from various sources , is now very strong. Climate change has importance for health in two main ways. First, some degree of climate change now appears inevitable, which means it is necessary to learn to adapt to climate change and to consider how to protect the population against its adverse effects. At the same time, major changes are needed in all sections of the economy to try to reduce human influence on climate change through reduction of greenhouse gas emissions mitigation. This implies substantial changes in energy use, transportation and in other sectors, which themselves are likely to have effects on health, for example through reduction of toxic air pollutants if dependence on the burning of fossil fuels is reduced.

The effects of global warming and climate change

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The major greenhouse gases emitted by the United States as a result of human activity, and their percentage share of total U. There are other greenhouse gases that are not counted in United States or international greenhouse gas inventories:. This greenhouse effect traps radiation from the sun and warms the planet's surface. As concentrations of these gases increase, more warming occurs than would happen naturally. Source: U.

Climate Change Indicators: Greenhouse Gases

Human action is causing an increase in global temperature. For that reason, the greenhouse effect, far from being our great ally as was the case in the past, is now a risk to our survival. The flooding of coastal cities, the desertification of fertile areas, the melting of glacial masses and the proliferation of devastating hurricanes are just some of the main consequences. Global warming is having a profound impact on the processes of soil degradation and is contributing to the desertification of the most arid areas on the planet. The increase in the global temperature of the planet produces a rise in the level of the sea, which will cause the disappearance of islands and coastal cities.

U.S. Energy Information Administration - EIA - Independent Statistics and Analysis

GREENHOUSE EFFECT

До нее тоже доходили подобные слухи. Так, может быть, она зря поднимает панику. - Мидж.  - Джабба засопел и сделал изрядный глоток.  - Если бы в игрушке Стратмора завелся вирус, он бы сразу мне позвонил.

Хорошая новость. Звонок из Соединенных Штатов. Он улыбнулся. Значит, все правда. - Из какого именно места в Штатах? - спросил. - Они ищут, господин.

У нее резко запершило в горле, и в поисках выхода она бросилась к двери. Переступив порог, она вовремя успела ухватиться за дверную раму и лишь благодаря этому удержалась на ногах: лестница исчезла, превратившись в искореженный раскаленный металл. Сьюзан в ужасе оглядела шифровалку, превратившуюся в море огня. Расплавленные остатки миллионов кремниевых чипов извергались из ТРАНСТЕКСТА подобно вулканической лаве, густой едкий дым поднимался кверху. Она узнала этот запах, запах плавящегося кремния, запах смертельного яда.

 Разница, - бормотал он себе под нос.  - Разница между U235 и U238. Должно быть что-то самое простое. Техник в оперативном штабе начал отсчет: - Пять. Четыре.

Всем известно, что невзламываемый алгоритм - математическая бессмыслица. Хейл улыбнулся: - Ну конечно… Принцип Бергофского. - А также здравый смысл! - отрезала. - Кто знает… - Хейл театрально вздохнул.  - Есть множество такого… что и не снилось нашим мудрецам.

5 comments

Nicole L.

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Lasana S.

Keywords: Global warming, greenhouse effect, greenhouse gas, climate models, climate change, chlorofluorocarbons, nitrous oxide, carbon dioxide, ozone.

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ValentГ­n S.

Natural processes include changes in the Earth's orbit of the sun which causes changes in the sun's intensity, plate tectonics changing the position and size of the continents and volcanic activity changing carbon emissions.

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