After hundreds of tons of dead fish were removed from the Oder River bordering Germany in August, new die-offs have compounded the ecological disaster. The causes are complex.
After Polish anglers removed tons of dead fish from the Oder River bordering Germany, the die-off has been labeled an "ecological disaster." But what's to blame?
After Polish anglers removed tons of dead fish from the Oder River bordering Germany, the die-off has been labeled an "ecological disaster." But what's to blame?