Often, they produce less pollution than gasoline or diesel.

If you don't, then yes, poor societies who haven't even heard of technology probably produce less pollution.

The diesel trucks that would be replaced produce dangerous pollution.

This concept would have produced far less radioactive pollution.

Modern mills produce considerably less pollution than those of a few decades ago.

Tractors benefit just as much from this clean fuel, which means they produce less pollution.

Environmentalists say companies that burn should be required to remove lead from the oil, which would increase their costs, but produce less pollution.

In Japan, the government is now offering financial incentives to consumers who buy cars which produce less pollution.

Using oil and other fossil fuels for energy produces pollution.

This is true, for example, if the firm produces pollution (see also external cost).