more, few, less

Space travel will become cheaper, so _______ people will travel to space.

We have only two tickets; we need _____ tickets for everyone.

There will be more deserts and ______ drinking water in the future.

Land for agriculture will shrink. There will be _______ food for people to eat.

The room is too noisy; please make _____ noise.

Deforestation will remain a problem. There will be ______ trees in our forests.

There will be ________ environmental problems. Technology will help fix them.

Gas-burning cars are becoming less popular. There will be _______ electric cars.

Last year there were 30 students; this year we had only 20 students, we had _____ participants.

You put too much salt; use _____ salt next time.

The bottle is almost empty; there is _____ water left.

This puzzle has too many pieces; please work with _____ pieces.