GLOBAL WARMING: Are humans causing it?

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The report based on the work of some 2,500 scientists in more than 130 countries concluded that humans have caused all or most of the planetary warming. Human-caused global warming is often called "anthropogenic climate change". *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 Earth's surface. *Humans are pouring carbon dioxide into the atmosphere much faster than plants and oceans can absorb it. *Some experts point out that natural cycles in Earth's orbit can alter the planet's 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. Today's changes have taken place over the past hundred years or less. SO WOULD YOU CONSIDER YOURSELVES ALSO A FACTOR CONTRIBUTING TO GLOBAL WARMING??? I would be glad to hear your opinion guys!!! ^_^