Chinese researchers have developed a method of removing oil from polluted water using tiny barbed spikes that mimic the natural design of a cactus. Writing in the journal Nature Communications, the Beijing-based researchers describe how arrays of tiny copper spikes, similar to the cone-shaped spikes of a type of cactus known as Opuntia microdasys,
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cactus
When most people look out on the hot, dry desert, they see the potential for a serious sunburn and probably a mirage or two. When Chilean entrepreneur Mario Llanis looks out on the cactus-riddled desert of his native country, he sees the possibility for a bio-energy source that could change the industry forever.