Google AdSense

As I write this I see that the smart Google ads on this page have picked up on the keywords in the post about the cloud of dust that is smothering Sydney and are advertising Dust Extraction.  It's a very clever technology but it really needs to be cleverer than that I think.  I suppose the success of the thing depends very much on how many visitors from Sydney I get who are looking for ways to clean up after the cloud and are planning to install an industrial strength extraction system to keep them safe and clean for the next twenty five years or so.  Not many I suspect.