Вставте предлоги пожалуйста1) There is no need to switch the upper

Вставте предлоги пожалуйста
1) There is no need to switch the upper light, it isnt dark
in the room. 2) The scientists should think about the way to prevent
rare animals becoming extinct. 3) Water pollution is caused
human activities. 4) Air pollution has negative impact
climate changes. 5) Huge areas of rainforests have been cut
for urban development. 6) The amount waste and
rubbish in big cities is increasing.