dec 3, 1759 - This is when the industrial revolution started. The industrial revolution is a major event because that is when machines are introduced. This then lead to further machines and other technologies being produced, which contributes to the production of carbon dioxide that causes the corals to bleach. - 1760 (Encyclopaedia Britannica, 2017)
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Date:
dec 3, 1759
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~ 266 years ago