Помогите пожалуйста!Write the names of five things that:1.people can do now,but

Помогите пожалуйста!
Write the names of five things that:
1.people can do now,but couldnt do 100 years ago,200 years ago;
2.people will be able to do 100 years from now;
3.may change the face of the earth completely;
4.might help to make the ecological situation better ;
5.might destroy the life on our planet.