Why can't we build a stadium sized air cleaner in major cities and filter the air?
Even better, we have a continent-sized filter, called forests and rainforests. I like your thinking. For the filter to work, though, the city would have to be enclosed in a sealed dome, which might be a bit expensive.
Wouldn't it be cheaper and more effective to require every smokestack in the world to have scrubbing technology installed first?
Copyright © 2018 HubPages Inc. and respective owners.
Other product and company names shown may be trademarks of their respective owners.
HubPages® is a registered Service Mark of HubPages, Inc.
HubPages and Hubbers (authors) may earn revenue on this page based on affiliate relationships and advertisements with partners including Amazon, Google, and others.