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Adapted from Reuters copy. Better quality, fewer lazy clichés :)
Bees can be trained to sniff out explosives using a process known as hymenoptera training. It takes about five hours to train a single bee.
However, using bees to detect explosives has proved unreliable because they actually sniff out the additives and are unable to detect explosives in their pure form.
Fox
Nearly a fifth of China's farmland is contaminated by toxic heavy metals and chemicals, and more than 33,000 sq km – an area the size of Belgium - is unfit for agricultural use, according to a soil survey carried out in April.