The different catalysts are in constant development to fulfill economic, political and environmental demands.

Also, warmer weather itself increases consumer, environmental and agricultural demands for water.

This theory is also consistent with growing evidence that the human brain changes structurally due to environmental demands.

One area of special interest is helping companies to predict what environmental demands will be made of them in the future.

Symbolic messages can prevent effective change or realistic responses to environmental demands.

Through our school programmes we alter the capabilities of the student so that environmental demands can be met.

Probably no other state faces more environmental demands and disputes than California.

The historical environmental demands, I think, that the right people take the right action.

We need sometimes to temper Utopian environmental demands with business reality.

We also need, however, to go further and make increased environmental demands of, for example, cars and aircraft.