Researchers are testing drones to see if they can help farmers fight weeds and pests. The drones can automatically map large agricultural fields, identify plants, and enable herbicides to be sprayed with precision, sparing the crops.
When a group of Brazilian families occupied disused farmland they found lifeless soil and water. Fifteen years on, they have nurtured it back to health. Now they can live from it.
Originally brought to Japan as pets, raccoons are being released into the wild when they become too big. Now it has become too difficult for Japanese authorities to control them. Julian Ryall reports from Tokyo.
Glyphosate, the world's most widely used weed killer, has caused concerns over its potential risk to human health and the environment for decades. Now, new research shows that glyphosate may be indirectly killing bees.
In wars of the future, life-or-death decisions may be made by machines — independent of human control. The development of autonomous weapons is moving fast. The UN in Geneva is trying to get countries to agree on a ban.
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