| http://www.w3.org/ns/prov#value | - ), yet almost half its population is considered vulnerable to water stress.A race around the world???s centreThe Tropics are an extraordinarily diverse region, covering an area surrounding the equator between the Tropic of Capricorn and the Tropic of Cancer that includes parts or all of countries such as Brazil, Bolivia, Nigeria, Zimbabwe, Yemen, Thailand, India, Indonesia, Papua New Guinea and Fi
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