Global Warming And Greenhouse Effect Causes And Effects Pdf

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What is global warming? What causes global warming? What is climate change?

Greenhouse Gases: Causes, Sources and Environmental Effects

Human activity is the main cause of climate change. People burn fossil fuels and convert land from forests to agriculture. Since the beginning of the Industrial Revolution, people have burned more and more fossil fuels and changed vast areas of land from forests to farmland. Burning fossil fuels produces carbon dioxide, a greenhouse gas. The greenhouse effect makes the earth warmer, just as a greenhouse is warmer than its surroundings.

Behind the struggle to address global warming and climate change lies the increase in greenhouse gases in our atmosphere. A greenhouse gas is any gaseous compound in the atmosphere that is capable of absorbing infrared radiation, thereby trapping and holding heat in the atmosphere. By increasing the heat in the atmosphere, greenhouse gases are responsible for the greenhouse effect, which ultimately leads to global warming. Global warming isn't a new concept in science. The basics of the phenomenon were worked out well over a century ago by Svante Arrhenius in

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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.

Causes of climate change

Jump to navigation. And yes, it's really happening. Over the past 50 years, the average global temperature has increased at the fastest rate in recorded history.

The effects of climate change span the physical environment , ecosystems and human societies. It also includes the economic and social changes which stem from living in a warmer world. Human-caused climate change is one of the threats to sustainability. Many physical impacts of climate change are already visible, including extreme weather events, glacier retreat , [7] changes in the timing of seasonal events e.

Global Warming 101

Effects of climate change

The greenhouse effect is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without this atmosphere. Radiatively active gases i. Part of this radiation is directed towards the surface, thus warming it. The temperature rises until the intensity of upward radiation from the surface, thus cooling it, balances the downward flow of energy. Earth's natural greenhouse effect is critical to supporting life, and initially was a precursor to life moving out of the ocean onto land. Human activities, mainly the burning of fossil fuels and clearcutting of forests, have increased the greenhouse effect and caused global warming. The term greenhouse effect is a slight misnomer , in the sense that physical greenhouses warm via a different mechanism.

Not a MyNAP member yet? Register for a free account to start saving and receiving special member only perks. Some of the incoming sunlight is reflected directly back into space, especially by bright surfaces such as ice and clouds, and the rest is absorbed by the surface and the atmosphere. Much of this absorbed solar energy is re-emitted as heat longwave or infrared radiation.


 - Это имя она произнесла с нарочитым пуэрто-риканским акцентом. - Кого? - спросил он чуть осипшим голосом. - Кармен.

Не появится. - Но вы же позвонили… Стратмор позволил себе наконец засмеяться. - Трюк, старый как мир. Никуда я не звонил.

 Три часа. Стратмор поднял брови. - Целых три часа. Так долго.