The virtue of this elevated position allowed spectators to see multiple scales simultaneously, viewing city blocks in proportion to a highway system as well as artificially controlled trees in glass domes.

"We have argued that the fox population does not need to be and cannot be artificially controlled," Dr. Lindley said.

Water levels in the swamp are controlled artificially and are managed both for waterbird conservation and for farming.

In commercial fruit marketing the rate of ripening is controlled artificially, thus enabling transport and distribution to be carefully planned.

Next year's additions include an outdoor skate park and a leisure pool with an artificially controlled current for inner tubing.

Some of it is sealed in containers or rooms with artificially controlled temperature and humidity.

Palma Aquarium has a series of research and investigation programs including developing coral reef reproduction and rehabilitation programs within artificially controlled environments.

Some of the technological advances included in the Petersburg Letters are air and space travel, the telephone, artificially controlled climates and the ability to photocopy.

They criticize the lack of ecological validity in many laboratory-based studies with a focus on artificially controlled and constricted environments.

But experience suggests that such promises are unrealistic, that health-care costs eventually explode even if they are artificially controlled, and that some new taxes are likely if the Government guarantees health insurance coverage for all.