The US space agency makes ground similar to that on the Moon from sand found in an Arizona desert, while Mars' crimson "soil" is scooped from a volcano in Hawaii, Wamelink told reporters.
Green sand beach lies on the slopes of the world's largest active volcano mauna loa.
绿沙海滩就位于全球最大的活火山冒纳罗亚的斜坡上。
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But Vanuatu has 10 idyllic white-sand islands, clear waters, waterfalls, great diving, the world's most accessible live volcano and food that grows faster than it can be picked.