Duckweed covers the water on the Dianpu River in Minhang District, Shanghai, May 24, 2016. Rising temperatures have increased growth of aquatic plants that have turned the river green. (Photo/IC)
Duckweed covers the water on the Dianpu River in Minhang District, Shanghai, May 24, 2016. Rising temperatures have increased growth of aquatic plants that have turned the river green. (Photo/IC)