Global warming is a big issue that affects all of us.

The use of fossil fuels is causing global warming.

The use of this machine is simple.

The process of terraforming is part of transforming other planets into a habitable environment for humans.

His irresponsible behavior caused an accident.

This car uses electricity as fuel.

Today is a particularly warm day, isn't it?

This room is filled with his warmth.

I like finding fossils.

This tree has fossilized over thousands of years.