Mining the Logs: Pollution: Historical Comparisons to today

This link contains the following thread from the H-Environment listserv:

Editor's Subject: Query: Pollution: historical comparison to today 
Author's Subject: Query: Pollution: historical comparison to today 
Date Written: Sun, 30 Nov 1997 14:29:36 -0500 
Date Posted: Tue, 01 Dec 1997 11:33:08 -0500

H-Net is celebrating 25 years of service by mining the logs of its 180+ networks for topical discussions, teaching and research resources, and milestones in H-Net’s history from a few email listservs to an online academic commons. Happy birthday, H-Net!