Runoff of untreated livestock waste adds to pollution in rivers and lakes.
Runoff of untreated livestock waste adds to pollution in rivers and lakes.
未经处理的家畜排泄物流入河流及湖泊，加重了对它们的污染。
Runoff of untreated livestock waste adds to pollution in rivers and lakes.
未经处理的家畜排泄物流入河流及湖泊，加重了对它们的污染。