Climate Change and the present perfect

Climate change _________________ (impact) our lives in many ways.

• impacted

• has impacted

• have impacted

Temperatures _________________ (rise) in many parts of the world.

• is risen

• has risen

• have risen

Our oceans _____________________ (feel) the impact of these warming temperatures as well.

• have feel

• have felt

• has felt

This _____________________ (cause) the death of coral reefs and the fish populations that take shelter there.

• have cause

• has caused

• have caused

Our trees, which convert carbon dioxide (a greenhouse gas) into oxygen, ___________________ (not be able to) keep up with the large amounts of the gas and they are producing larger amounts of pollen.

• is not able to

• hasn't been able to

• haven't been able to

Allergies _________________ (become) worse.

• have become

• is becoming

• has become

Diseases caused by mosquitos and other pests __________________ (also worsen) since they now occur in more parts of the world.

• has also worsened

• have also worsened

• had also worsened

The number of tornadoes and hurricanes each year______________________ (increase).

• has increased

• is increasing

• have increased

The size of many of the world’s beaches _________________ (decrease) due to the rising levels of water brought about by global warming.

• has decreased

• have decreased

• decreased

China and the United States _______________ (pledge) to decrease their carbon emissions.

• did pledge

• has pledged

• have pledged