The reason appears to be that as efficiency technology penetrates the market and reduces carbon prices, more of a price signal is required to generate further reductions in the three conventional pollutants.
Price signal's need to be increased in order to get reductions in pollutants.
Price signal's need to be decreased in order to get reductions in pollutants.
La Marina does not resemble a Mediterranean port.
No one is in sight
Everybody is carrying on their own conversation.
The man was exposing his bare legs.
A skater is attempting a jump, but his skateboard is rolling away from him.
There are men outside.