It is estimated that more than a billion people make a living from wetlands, but it's also estimated that more than 64% of our wetlands have disappeared since 1900. In conjunction with World Wetlands Day -- which is celebrated annually on the 2nd of February -- we speak to Associate Professor Catherine Yule, an aquatic biologist, about it's importance and the urgent need to protect what's left.

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Tags:  world wetlands day,  wetlands,  ecosystem,  environmental conservation