Concern for the environment has focused out attention on the world's ecological problems.

The Sound has only recently gotten attention for its ecological problems.

In the first place, it tells us that ecological problems must be taken seriously.

It is also a very dramatic ecological problem and a safety issue for the populations.

"A lot of ecological problems come from not looking at resources on a local level."

"Not that we don't have big ecological problems," he said.

Political and social issues are intertwined with the ecological problems.

He had seen this only as an ecological problem, not a human one.

He would not attack your people unless they were causing some kind of ecological problem.

The parallels of the ecological problems with the financial crisis are clear.