EARTH HOUR

On this day, people 'go dark' - __________ , switch off lights in their homes, schools and businesses.

• that is

• since then

• even

• instead of

It started in Australia in 2007. ___________

it has grown into an international event.

• even

• instead

• since then

• and

Famous buildings have gone dark for Earth Hour. _________

astronauts on the International Space Station have taken part.

• Instead

• But

• And

• Even

The idea is to raise people's awareness of environmental issues . ___________

the small things we can do in our everyday life to protect nature.

• And

• But

• Instead

• However

Switching off the lights for just one hour saves only a small amount of power. ____________

it has a much greater effect by making people think about the problem of climate change.

• Since then

• But

• And

• That is

Using low-energy electrical items ___________

high-energy ones can help the planet.

• but

• since

• even

• instead of