First, though, there's a little matter of the ecological balance.

There also was the problem of establishing a new ecological balance.

Then, too, I trade for whatever is required to maintain a healthy ecological balance.

Projects like disaster management and ecological balance are part of work education.

What would happen to the delicate ecological balance, developed over millions of years?

Instead, they set about to destroy the continent's natural ecological balance.

There was little effort at first to study how the ecological balance could shift through time as the result of evolution.

This could pose danger to the local area's ecological balance.

The increase in tourist activities, among other problems, continues to present a serious challenge to the park's ecological balance.

Conservation of soil is done to maintain the ecological balance.

The game is about to reach ecological balance in neighboring towns.

The rise in tourism also affected the ecological balance of the area.

We need farmers who maintain the ecological balance and care for the countryside.

He said, "How do you know that a planet can bear a more complex ecological balance if they all have simple ones?"

This ecological balance is now being threatened by governmental and private interests.

The ecological balance doesn't have any parallel in Earth's records."

The ecological balance in the area could be destroyed.

Few people appreciate the importance the river plays (or used to play) in the region's ecological balance.

They are a benign part of the ecological balance.

They did not respect an ecological balance, and today we can see the impact of their actions on the poorest populations.

Bees play an important role in the ecological balance, and their demise has serious effects on the food chain.

Mountain ecological balance - an important factor in prevention of emergency situations.

These were replaced with young trees over several years, and helped to alter the ecological balance of the reserve.

Somewhere there may be an ecological balance as complex as that of Earth.

Nor did they care whether they destroyed the ecological balance of the region.