1. The climate is changing because the global surface temperature has increased 0.74 degrees Celsius since the late 19th century. The temperature increases about 0.13 degrees every ten years. Some parts of the globe have not increased in temperature but have cooled instead.
2. Human activity has increased greenhouse gases and a lot of carbon dioxide is being released into the atmosphere.
3. The climate is warming but not globally.
4. Some parts of the globe have cooled and haven't been "blanketed" by the greenhouse gases. Parts of the southeastern U.S. and North Atlantic have cooled.
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