A.misleading
B.illogical
C.complicated
D.inappropriate
A.Population explosion.
B.Too much consumption.
C.It is out-dated to reuse things.
D.High unemployment rate.
A.Building sewage-treatment plants.
B.Strict restriction on the discharge of polluted water to rivers or lakes nearby.
C.Using gigantic tanks to separate solid materials from water.
D.Setting underground sewage system to purify water.
A.The severity of pollution nowadays
B.Pollution and its solution
C.Universal concern over environment
D.Consumption and pollution