#Nuclear
Target:
the president of the United States of America
Region:
GLOBAL

People may have begun altering the world's climate as early as 8,000 years ago, says William Ruddiman, a climate scientist with the University of Virginia.

Ruddiman's analysis shows that between 8,000 and 150 years ago, humans put enough greenhouse gases into the atmosphere to account for a global temperature increase of 1.4 degrees Fahrenheit -- roughly the same warming effect that greenhouse gases have caused over the past century. If his data is correct, this doubles the estimated human impact on climate.

His evidence comes from ice cores drilled from Greenland and Antarctica that record climate history over the past 400,000 years. They show that levels of so-called greenhouse gases -- those thought to be responsible for increasing global temperatures -- began their rise along with human civilization:

The data show that after the end of the last ice age, about 8,000 years ago, levels of carbon dioxide mysteriously started rising at a time when they should have been dropping. The same holds true for methane levels from about 5,000 years ago. Other researchers have tried to attribute those changes to natural causes. According to Ruddiman, however, humans are to blame. He says the following coincidences of timing support his theory:

People started clearing forests for pastures and cropland -- a process that puts more carbon dioxide into the atmosphere -- about 8,000 years ago in Europe and Asia.

People also started raising livestock and flooding rice paddies -- processes that emit methane -- about 5,000 years ago in Asia.

Still, Ruddiman says, the work doesn't change the prevailing scientific opinion about greenhouse gases today -- that over the last 150 years, human activities have built up enough of them in the atmosphere to contribute noticeably to the observed global warming.

Ever since the New Stone Ages people have found ways to use energy to reach there needs. Today people still do. But if global warming continues all the ice at the Artic places will melt and states, or countries around the coast will be flooded such as California, Florida, Hawaii, Vietnam, part of China, Philippines,etc.

Not only that but the world's population will increase massively. All the cute little animals we know are gonna go extinct, such as polar bears, frogs, pandas, fish, and eventually all of us, and most importantly the trees.

Global warming will ruin the health of future generations.

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The Stop Global Warming for All Ages petition to the president of the United States of America was written by Crystal and is in the category Nuclear at GoPetition.