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Fish swimming off the coral rich coast of Egypt's Red Sea resort of Hurghada.
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Egypt's tourism sector took a major hit from a series of security shocks, including the downing of a passenger jet packed full of Russian tourists in 2015, before rebounding from 2017.
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The rebound in tourism could put further pressure on Egypt's corals, according to local experts.
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Red Sea province recently banned single use plastics, but an Egyptian academic says more needs to be done to preserve marine heritage.
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Scientists consider the Red Sea's reefs the most climate change-resilient corals but say they are still under threat.
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With up to 12 million tonnes of plastic entering our oceans every year, the UNEP believes marine plastic pollution is one of the most pressing environmental challenges of our time.