Rather, a new understanding of the environmental challenge is required.

This is the kind of initiative needed to meet environmental challenges at the local level.

Climate change is the defining environmental challenge of our time.

Now, the greatest environmental challenge of the new century is global warming.

There are no simple answers to the complex economic, social and environmental challenges of the present day.

The Union needs own resources quickly if it is to tackle our economic, social and environmental challenges.

In addition, there are of course some major environmental challenges.

Farmers who take up the environmental challenge will have a financial advantage compared with the current system.

The series attempts to identify the Earth's most significant environmental challenges.

These properties also present serious environmental challenges to the growth of heavy oil production and use.