was told by a reliable person about the BJ pollution sources; 1/3 from vehicles, 1/3 from construction, & 1/3 from coal. Now this is an average & BJ has 5 million vehicles, the construction in BJ is about the same as all of Euorpe, and coal is needed to produce heat & power for the city of 23 million people.

Thus, wind is needed to move the pollution out.