Find the five mistakes and correct them.
People have invent greenhouses in order to grow
vegetables and fruit all year long. Inside a greenhouse,
it is warm even during winter. But sadly, the same thing
is happening to the earth. Pollution have caused the
greenhouse effect. People have used a lot of energy in
factories. Also, they have used a lot of gas and coal in
cars and trains. These materials put toxic gases into the
have warned that this has many negative effects. The temperature
has goed up. Plants not have grown well, and the amount of drinking water has
decreased. In order to stop the greenhouse effect, scientists have thinked of new ways
to produce energy. And people to have tried to use less gas and coal.
air. Scientists
Unit 9- Present Perfect