All About the Greengouse Effect

Is the end of the world coming? Can we prevent it? How? How serious is the effects of Global warming?
The main problem of the world is Global warming:
Global warming is an increase in the average temperature of the Earth's near-surface air and oceans. Although global warming has occurred in the past, the term is often used to describe future anticipated warming of the earth due to greenhouse gasses.
Global average air temperature near Earth's surface rose 0.74 ± 0.18 °Celsius (1.3 ± 0.32 °Fahrenheit) in the last century. The Intergovernmental Panel on Climate Change (IPCC) concludes, "most of the observed increase in globally averaged temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations," which leads to warming of the surface and lower atmosphere by increasing the greenhouse effect. While this conclusion has been endorsed by certain scientific societies and academies of science, other scientists disagree about the primary causes of the observed warming.
Models referenced by the IPCC predict that global temperatures are likely to increase by 1.1 to 6.4 °C (2.0 to 11.5 °F) between 1990 and 2100. The range of values reflects the use of differing scenarios of future greenhouse gas emissions as well as uncertainties regarding climate sensitivity. Although most studies focus on the period up to 2100, warming and sea level rise are expected to continue for more than a millennium even if no further greenhouse gases are released after this date. This reflects the long average atmospheric lifetime of carbon dioxide (CO2).
An increase in global temperatures can in turn cause other changes, including a rising sea level and changes in the amount and pattern of precipitation. There may also be increases in the frequency and intensity of extreme weather events, though it is difficult to connect specific events to global warming. Other consequences include changes in agricultural yields, glacier retreat, reduced summer streamflows, species extinctions and increases in the ranges of disease vectors.
Remaining scientific uncertainties include the exact degree of climate change expected in the future, and especially how changes will vary from region to region across the globe. A hotly contested political and public debate also has yet to be resolved, regarding whether anything should be done, and what could be cost-effectively done to reduce or reverse future warming, or to deal with the expected consequences. Most national governments have signed and ratified the Kyoto Protocol aimed at combating greenhouse gas emissions.
What are the signs:
Direct manifestations of a widespread and long-term trend toward warmer global temperatures
Heat waves and periods of unusually warm weather
Ocean warming, sea-level rise and coastal flooding
Glaciers melting
Arctic and Antarctic warming
Events that foreshadow the types of impacts likely to become more frequent and widespread with continued warming.
Spreading disease
Earlier spring arrival
Plant and animal range shifts and population changes
Coral reef bleaching
Downpours, heavy snowfalls, and flooding
Droughts and fires
The map of early warning signs clearly illustrates the global nature of climate changes. In its 2001 assessment, the Intergovernmental Panel on Climate Change (IPCC) concluded that, an increasing body of observations gives a collective picture of a warming world and other changes in the climate system."
While North America and Europe—where the science is strongest—exhibit the highest density of indicators, scientists have made a great effort in recent years to document the early impacts of global warming on other continents. Our map update reflects this emerging knowledge from all parts of the world.
Although factors other than climate may have intensified the severity of some of the events on the map, scientists predict such problems will increase if emissions of heat-trapping gases are not brought under control.
Effects:
The predicted effects for the environment and for human life are numerous and varied. The main effect is an increasing global average temperature. From this flow a variety of resulting effects, namely, rising sea levels, altered patterns of agriculture, increased extreme weather events, and the expansion of the range of tropical diseases. In some cases, the effects may already be occurring, although it is generally difficult to attribute specific natural phenomena to long-term global warming.
A summary of possible effects and our current understanding can be found in the report of the IPCC Working Group II; a discussion of projected climate changes is found in WG I. The more recent IPCC Fourth Assessment Report outlines the latest agreed international thinking, but omits more controversial ongoing work, particularly in respect of positive feedback mechanisms that might ultimately have the potential to lead to a runaway greenhouse effect.
Proposed responses to the effects of global warming fall into two categories: mitigation and adaptation.
And last prevention:
We can prevent global warming through loving and caring the natural resources that we have.
Now we know all about the main issue of the Earth, the greenhouse effect. Now we must prevent it to maintain the evolution of people and to mainatin the normality of the world.