Is mankind responsible for global warming essay

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Is mankind responsible for global warming essay

External forcings include natural phenomena such as volcanic eruptions and variations in the sun's output. Radiative forcing is a measure of how various factors alter the energy balance of the Earth's atmosphere. Between the start of the Industrial Revolution inand the yearthe increase in the atmospheric concentration of carbon dioxide chemical formula: CO2 led to a positive radiative forcing, averaged over the Earth's surface areaof about 1.

The climate system will vary in response to changes in forcings. This internal variability is a result of complex interactions between components of the climate system, such as the coupling between the atmosphere and ocean see also the later section on Internal climate variability and global warming.

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Human factors include the emissions of heat-trapping "greenhouse" gases and particulates as well as clearing of forests and other land-use changes. Attribution requires demonstrating that a signal is: Key attributions Greenhouse gases Carbon dioxide is the primary greenhouse gas that is contributing to recent climate change.

The Kyoto Protocol lists these together with hydrofluorocarbon HFCsperfluorocarbons PFCsand sulfur hexafluoride SF6[24] which are entirely artificial gases, as contributors to radiative forcing.

The chart at right attributes anthropogenic greenhouse gas emissions to eight main economic sectors, of which the largest contributors are power stations many of which burn coal or other fossil fuelsindustrial processes, transportation fuels generally fossil fuelsand agricultural by-products mainly methane from enteric fermentation and nitrous oxide from fertilizer use.

However, on a global scale, the concentration of water vapor is controlled by temperature, which influences overall rates of evaporation and precipitation.

Between andabout two-thirds of anthropogenic CO2 emissions were produced from burning fossil fuels, and about one-third of emissions from changes in land use, [27] primarily deforestation.

Christopher Bollyn

A second reason that climate change has been attributed to land use is that the terrestrial albedo is often altered by use, which leads to radiative forcing. This effect is more significant locally than globally. Aerosols produced are primarily black carbon. Over the past years human activities have released increasing quantities of greenhouse gases into the atmosphere.

This has led to increases in mean global temperature, or global warming. Other human effects are relevant—for example, sulphate aerosols are believed to have a cooling effect. Natural factors also contribute.

According to the historical temperature record of the last century, the Earth's near-surface air temperature has risen around 0.

The phrase "balance of evidence" suggested the English common-law standard of proof required in civil as opposed to criminal courts: In the Third Assessment Report TAR refined this, saying "There is new and stronger evidence that most of the warming observed over the last 50 years is attributable to human activities".

Evidence of the effect of external influences, both anthropogenic and natural, on the climate system has continued to accumulate since the TAR. The warming occurred in both the ocean and the atmosphere and took place at a time when natural external forcing factors would likely have produced cooling.

Among the possible factors that could produce changes in global mean temperature are internal variability of the climate system, external forcing, an increase in concentration of greenhouse gases, or any combination of these. Current studies indicate that the increase in greenhouse gases, most notably CO2, is mostly responsible for the observed warming.

Evidence for this conclusion includes: Estimates of internal variability from climate models, and reconstructions of past temperatures, indicate that the warming is unlikely to be entirely natural. Climate models forced by natural factors and increased greenhouse gases and aerosols reproduce the observed global temperature changes; those forced by natural factors alone do not.Chanmok.

(). Global Warming and Human Pollution. AuthorHouse. This book particularly identifies the issue of global warming, and how it has been allegedly related to .

Is mankind responsible for global warming essay

Debate about whether global warming is a natural occurrence or not. Discover if your peers believe humans are responsible for global warming.

Must-See Videos. Here’s a collection of Internet videos exposing the lies used by global warming evangelists to promote their cause to an uninformed public.

Ten years ago, Al Gore claimed we had 10 years to save the planet from global warming, as pointed out in this Communist BS (CBS News) report from early Unless drastic measures to reduce greenhouse gases are taken within the next 10 years, the world will reach a point of no return, Gore said.

Buy Merchants of Doubt: How a Handful of Scientists Obscured the Truth on Issues from Tobacco Smoke to Global Warming on FREE SHIPPING on qualified orders. Mar 12,  · The relatively thin atmospheric cocoon that protects us from meteor impacts and radiation also makes for a habitable climate, thanks to the greenhouse gases it .

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