Der Hammer -
Too late in the sense that Humanity is too set in its ways to make wholesale changes for the sake of the Environment.
When I was a kid a recall watching a documentary from China showing how they had plans to "filter" emmissions through water. The resulting sludge was to be used in the Construction Industry as fill material. It appears that they have abandoned that philosophy, and are just pumping the smoke into the Atmosphere.
Pollution is a cumulative thing - oh, here we go again...