The water quality can change due to both environmental and human impact.

A work that shows the human impact of the conflict.

Significant human impacts on the area began in the 16th century.

There are a few things that could be done to reduce human impact.

Human impacts during the 19th and 20th century have been significant.

Environmental scientists make use of such data to track changes in climate and human impact.

Rather, they trace more than a century of human impact and environmental abuse.

Nutrient level is a large issue due to the human impact.

If the only location is the one site, then it could be threatened by a single human impact.

The reason for the decline in distribution is thought to be due to human impact and development.