Choose the sentence that best combines each pair of sentences given.

They decided to cut down their carbon footprints. They were praised for that.

Numerous catastrophic consequences result in climate change.

Numerous catastrophic consequences result from climate change.

Climate change results from numerous catastrophic consequences.

Numerous catastrophic consequences cause climate change.

Some animals go extinct due to changes in climate where they live.

Climate changes make some animals go extinct where they live.

The climate changes where some animals there go extinct.

That some animals go extinct causes the climate where they live to change.

Cutting down energy use is the only way to reduce global warming.

Global warming is among many ways to cut down energy use.

Helping reduce global warming is a way to cut down energy use.

Cutting down energy use is one of the ways to reduce global warming.

Deforestation and loss of habitat threaten many species so that they will become extinct.

Many species lost their habitat because of deforestation and now they are extinct.

Deforestation and loss of habitat are driving many species to the verge of extinction.

Many species are extinct, so they run the risk of deforestation and loss of habitat.

Because of releasing a large amount of carbon dioxide, motor vehicles run on petrol.

A large amount of carbon dioxide emission results from motor vehicles running on petrol.

A large amount of carbon dioxide emission causes motor vehicles to run on petrol.

Emitting a large amount of carbon dioxide is one of the responsibilities of motor vehicles running on petrol.

It is alarming that deforestation damages the quality of the land.

The quality of the land deteriorates as the result of the alarming rate of deforestation.

The alarming rate of deforestation results from damage to the quality of the land.

The damage to the quality of the land is to blame for the alarming rate of deforestation.

Carbon dioxide is the only greenhouse gas that causes global warming.

Global warming results in greenhouse gases, including carbon dioxide.

One of the main greenhouse gases that lead to global warming is carbon dioxide.

Global warming causes greenhouse gases, including carbon dioxide.