Sometimes the buildings available would cost too much," he said, "and sometimes they were not environmentally clean.

If we manage to trace this process, we'll eventually be able to reproduce it, and our country would get a new environmentally clean power source.

The ads, for example, said that nuclear power was "environmentally clean," but the letter said that hot water discharged from the plants hurts the environment.

I bought a small fiberglass boat with an environmentally clean and economical four-stroke outboard motor.

Despite all the talk about nuclear power as the environmentally clean response to electricity shortages and global warming, many Americans are understandably wary.

This method is considered environmentally clean, low cost, selective, and ethical.

The site, once home to an oil tank farm, would have to be certified as environmentally clean.

When asked in surveys, 80% of consumers claim that they would prefer to buy products of environmentally clean provenance if given the choice.

This energy is safe, environmentally clean and will reduce our dependence on imports.

Their supporters say they supply an environmentally clean and safe power source, producing no pollutants.