Ответ:

land pollution. people should not live litter in streets.

air pollution. concentration of smoke.....

water pollution. plants should not dump chemical.....

global warming. the number of cars

disruption. we should stop killing animals.

.......

if we did not want land pollution , littter should not be leaved by people.

if we did not want air pollution,concentration of smoke should be controlled.

if we did not want water pollution, chemical wastes should not be dumped into water

if we did not want global warming,the number of cars should be reduced

if we did not want disruption, animals should not be killed by us. или же if we did not want disruption, we should stop killing animals