The mechanical and natural components may be used in conjunction with each other or separately at different times of day.

However, in other circumstances they may become a natural component of the habitat.

The filters for choosing natural and man-made components on the map do not offer enough choices.

All the colors are come from the natural component which is herbs.

The major source of radiation to which people are exposed is the natural environmental component (table 5.5).

By restoring these base natural components first, more plant, animal and insect species will benefit in a given area.

The two young men tried to make themselves invisible against the Cliff, thinking like part of the landscape, moving like natural components.

Water vapor is a natural and very important component of the Earth's atmosphere.

"Some would like to say it's because of human activity, but there's also a natural component."

The process required a natural component to work.