Consumers get agitated when they see apples, celery and red peppers singled out for containing the most pesticide residue. Scientists say it's not such a big deal because the pesticide levels are extremely low.
U.N. Secretary-General Ban Ki-moon wants to kick-start a big initiative to double the share of renewable energy worldwide, make sure everyone on the planet has power, and cut in half the amount of wasted energy. But critics say the agenda in Rio is so bloated that it's unclear what can be accomplished.
The Chauvet prehistoric cave paintings in France have always glimmered with a mystery. An article in the June issue of Antiquity suggests that the paintings, dating back 30,000 years, may amount to the first animated cartoons.
Some accuse companies buying up land in Africa of dispossessing native farmers and using up scarce resources. But the Rei do Agro farm tries to be a good neighbor in Mozambique while banking on soybean profits.
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