In some cases, these exotic species have a negative impact on the environment.

To the residents, a healthy older person is something of an exotic species.

Exotic species can have many negative impacts on the environment, the economy, and human health.

These recent changes may be attributable to the new exotic species.

I have taken it much further, and using the exotic species from hundreds of worlds.

Strangers in a strange land: The problem of exotic species.

Many of the exotic species have information boards to promote education.

The past introduction of several exotic species to the park is an additional human influence on the area.

Like other exotic species, the invasion is due to human actions.

In addition, something needs to be done about exotic species and the problem of ballast water.