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xkcd : Earth Temperature Timeline
(imgs.xkcd.com)
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What is geoscience?
Geoscience (also called Earth Science) is the study of Earth. Geoscience includes so much more than rocks and volcanoes, it studies the processes that form and shape Earth's surface, the natural resources we use, and how water and ecosystems are interconnected. Geoscience uses tools and techniques from other science fields as well, such as chemistry, physics, biology, and math! Read more...
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Climate
This timeline starts at about the coldest point in the last 66 million years. Definitely not biased.
I don't see how this is biased. Showing that the Earth did warm up over time before major human climate change started would be, very weakly, supporting that climate change isn't real. If they wanted to be biased they would start at a warm point, and when the Earth is cooling down they'd be like "see! Earth cools naturally, so it must get warm because of climate change!"
To make my stance crystal clear, I believe in and am deeply concerned by climate change