Though that is technically true, the actual ecological impact would be far greater.

The ecological impact of the trend is harder to predict.

All things being equal, the ecological impact of a plastic bag is greater than a paper one.

The human population in the palaeolithic wasn't big enough to have much of an ecological impact.

One such use is returning water that has been used back into the natural environment without adverse ecological impact.

The Koreshans had a major ecological impact on the river when they were living there.

Construction, which has not yet begun, is controversial due to its potential ecological impact.

How is this "product" produced and what are the ecological impacts?

Macondo-252 oil may also drop within the water column and impose a new kind of ecological impact.

The environmental and ecological impact of these areas has not been established.