How, then, should Congress weigh the potential environmental costs against the economic benefits?

"You have to ask if the reward is worth the environmental cost of making it happen," he said.

But what is the environmental cost of all these products?

The environmental cost, the park service said, was too great.

One of the main factors the university cited was environmental costs.

The entire project was removed because of rising environmental costs.

This is because the environmental and social costs are not passed on to the passengers.

In this way, they can factor those environmental costs into the final price of the product.

They often carry a heavy human, economic and environmental cost.

Not everyone is excited by this idea because of the environmental costs.