Some of the harmful substances polluting lakes and rivers act like hormones. It is difficult to detect them, however. A researcher in Berlin has found a simple method involving frogs.
Drinking water around an oil-producing area in South Sudan is heavily polluted. A German NGO puts the blame on Malaysian oil company Petronas. It has also become a subject of embarrassment for carmaker Daimler.
The battle against US President Donald Trump's rollback of environmental protections is increasingly being fought in the legal arena, with new lawsuits recently launched to stop actions on pesticides and Arctic drilling.
Each year, several million wild frogs are sold in supermarkets around the world. A study suggests most species aren't labeled correctly. The trade in frogs' legs is out of control, the authors warn.
From antibiotics to hormones and pain killers - residue from drugs is found in wastewater, rivers, fish, and even in polar bear fat. But chemists say they may know how to end this environmental pollution.
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