Invasive water lettuce clogging Yangtze

In recent days, a large quantity of invasive water lettuce has appeared on the surface of the Yangtze River in Chongqing, clogging waterways and threatening the safety of boats.

After heavy rains on the upper reaches of the river last week, the plants washed into Chongqing on Saturday at about noon. Large amounts soon gathered in the middle of the river and along the banks.

On Tuesday, the city's maritime department issued a warning and asked boats to avoid the floating plants.