The issue of global warming and the greenhouse effect

In its place,we are entering a period of consequences.

The issue of global warming and the greenhouse effect

Posted on 30 June by Kevin Judd Guest post by Kevin Judd Climate scientists are telling us that gases like carbon dioxide are causing global warming.

Global Warming, Spin and Media — Global Issues

Carbon dioxide is produced when petrol is burned in your car engine, or when coal and gas are burned at power-stations to make electricity. Carbon dioxide causes global warming because it contributes to the so-called greenhouse effect.

So what is this greenhouse effect? Winter is a good opportunity to observe the greenhouse effect in action. It should be obvious that sunlight heats the earth: This happens because clouds trap heat.

The more clouds there are, the warmer it stays overnight. So how does this heat trapping work? And how does carbon dioxide come into play? You know that radio stations have different frequencies. When you tune your radio to your favourite station, you are telling your radio receiver to block all radio-frequencies except those that the station uses.

Heat, just like radio-waves, has different frequencies, and clouds, just like a radio receiver, block certain frequencies of heat and allow other frequencies through. Without clouds most frequencies of heat escape into space and it gets very cold overnight. When there are clouds, some frequencies of heat are blocked from escaping into space, keeping it warmer.

It turns out that clouds and carbon dioxide trap heat differently, like radios tuned to different frequencies. In fact, carbon dioxide pretty much blocks precisely those frequencies that clouds would allow through. Add to this the fact that unlike clouds, which come and go, carbon dioxide is always there, its warming effect occurs even when the sky is clear and dry.

You can probably understand now why climate scientists are so concerned about carbon dioxide. The more carbon dioxide in the atmosphere, the hotter the earth will become. Of course, this is a simplified explanation of global warming, but the basic story I have just told you is correct.

Scientists have known and understood this for over years, and it has been confirmed in laboratory experiments.Q: What causes global warming? A: Global warming occurs when carbon dioxide (CO2) and other air pollutants and greenhouse gases collect in the atmosphere and absorb sunlight and solar radiation that have bounced off the earth’s surface.

Normally, this radiation would escape into space—but these pollutants, which can last for years to centuries in the atmosphere, trap the heat and cause the planet . The main driver of today's warming is the combustion of fossil fuels. These hydrocarbons heat up the planet via the greenhouse effect, which is caused by the interaction between Earth's atmosphere.

The issue of global warming and the greenhouse effect

The effects of global warming are the environmental and social changes caused (directly or indirectly) by human emissions of greenhouse is a scientific consensus that climate change is occurring, and that human activities are the primary driver.

Many impacts of climate change have already been observed, including glacier retreat, changes in the timing of seasonal events (e.g.

Accompanying the concerns of climate change and global warming is the media spin, propaganda, and special interests. For many years in some countries, scientists and environmental groups raising concerns about climate change faced stern opposition, and at one time, ridicule.

Initially, many big businesses and countries such as the United States were openly challenging concerns of climate .

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Nov 20,  · Global Warming: News, Facts, Causes & Effects. Global warming is the term used to describe a gradual increase in the average temperature of the Earth's atmosphere and its oceans, a . Anthropogenic Climate Change. Anthropogenic climate change refers to the production of greenhouse gases emitted by human activity.

By examining the polar ice cores, scientists are convinced that human activity has increased the proportion of greenhouse gases in the atmosphere, which has skyrocketed over the past few hundred years. - CO2 and the "Greenhouse Effect" Doom