Most experts ______ that oil will become more expensive in the future.

• development

• forecast

Population ______________ will mean that by the year 2020, there will be 30% more people in the world.

• growth

• estimate

In desert areas, there is often a water _______________.

• demand

• shortage

There is a rising ________________for oil as people worldwide are continuing to use it.

• demand

• impact

Do you think we will ever________________ out of oil?

• get

• run

________________ change is causing some rivers and lakes to dry up completely.

• Climate

• Issue

The availability of clean drinking water is becoming a serious __________________ in many parts of the world.

• demand

• threat

The situation has ________________ since last year – it’s much more difficult now.

• got worse

• impact

Our sales department has_______________ that sales will rise 10% next year.

• got worse

• estimated

The biggest _______________ of any shortage is always on the poor, and those in developing countries.

• impact

• issue