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Published: Monday 22 July, 2013

bags women designer bags women designer Global Warming Fast Facts

Industrialization, deforestation, and pollution have greatly increased atmospheric concentrations of water vapor, carbon dioxide, methane, and nitrous oxide, all greenhouse gases that help trap heat near Earths surface. See an interactive feature on how global warming works.

Humans are pouring carbon dioxide into the atmosphere much faster than plants and oceans can absorb it.

These gases persist in the atmosphere for years, meaning that even if such emissions were eliminated today, it would not immediately stop global warming.

Some experts point out that natural cycles in Earths orbit can alter the planets exposure to sunlight, which may explain the current trend. Earth has indeed experienced warming and cooling cycles roughly every hundred thousand years due to these orbital shifts, but such changes have occurred over the span of several centuries. Todays changes have taken place over the past hundred years or less.

Other recent research has suggested that the effects of variations in the suns output are negligible as a factor in warming, but other, more complicated solar mechanisms could possibly play a role.

A followup report by the IPCC released in April 2007 warned that global warming could lead to largescale food and water shortages and have catastrophic effects on wildlife.

Sea level could rise between 7 and 23 inches 18 to 59 centimeters by centurys end, the IPCCs February 2007 report projects. Rises of just 4 inches 10 centimeters could flood many South Seas islands and swamp large parts of Southeast Asia.

Some hundred million people live within 3 feet 1 meter of mean sea level, and much of the worlds population is concen bags women designer trated in vulnerable coastal cities.

Glaciers around the world could melt, causing sea levels to rise while creating water shortages in regions dependent on runoff for fresh water.

Strong hurricanes, droughts, heat waves, wildfires, and other natural disasters may become commonplace in many parts of the world. The growth of deserts may also cause food shortages in many places.

More than a million species face extinction from disappearing habitat, changing ecosystems, and acidifying oceans.

The oceans circulation system, known as the ocean conveyor belt, could be permanently altered, causing a miniice age in Western Europe and other rapid changes.

At some point in the future, warming could become uncontrollable by creating a socalled positive feedback effect. Rising temperatures could release additional greenhouse gases by unlocking methane in permafrost and undersea deposits, freeing carbon trapped in sea ice, and causing increased evaporation of water. climate scientists discussing whether certain data should be released to the public.

The email exchanges also refer to statistical tricks used to illustrate climate change? trends, and call climate skeptics idiots, according to the New York Times.

One such trick was used to create the wellknown hockeystick graph, which shows a sharp uptick in bags women designer temperature increases during the 20th century.

The data used for this graph come from two sources: thermostat readings and treering samples.

While thermostat readings have consistently shown a temperature rise over the past hundred years, treering samples show temperature increases stalling around 1960.

On the hockeystick bags women designer graph, thermostatonly data is grafted onto data that incorporates both thermostat and treering readings, essentially presenting a seamless picture of two different data sets, the hacked emails revealed.

But scientists argue that dropping the treering data was no secret and has been written about in the scientific literature for years.

Climate change skeptics have heralded the emails as an attempt to fool the public, according to the Times.

Yet climate scientists maintain that these controversial points are small blips that are inevitable in scientific research, and that the evidence for humaninduced climate change is much broader and still widely accepted. bags women designer