Choose the correct answer.

The Saudi government is investing billions in __________ to support the enormous influx of people in Mecca.

Choose the correct answer.

People's lives will continue to be threatened ______ the continuous risk of earthquakes and tsunamis here.

Choose the correct answer.

Eco-friendly transport systems will reduce greenhouse gas ______.

Choose the correct answer.

In addition, more ______ zones for walking and cycle paths will be made available for people in all neighbourhoods.

Choose the correct answer.

Visitors can wander around here without difficulty because most of the antique area is now a pedestrian __________.

Choose the correct answer.

We must improve the environment through __________ design and greener buildings.

Choose the correct answer.

All fossil fuels are ______ resources that cannot be replaced after use.