What are the beneficial changes in the environment?

effects of change in materials to the environment:

there are bad effects and good effects of changes.there's an example of bad and good effects.

GOOD EFFECTS

1.Using modern technology,our works will become easier and faster.

a.machines-

w/out machines may be we our now getting illness

b.poisonous spray-

w/out this may be we are tired on catching cockroaches and mosquitos and flies and other harmful insects to be killed

BAD EFFECTS

1.Using modern materials,there are bad effects too.

a.smoke-

other people is always making smoke,if they use it too much,may be our ozone layer will become thinner and thinner and thinner that can cause a very hot season or even global warming

b.pollution-

w/ this peoples can get sick