(Natural News) A treasure trove of documents exposing the dirty deeds of the chemical industry has now been posted online thanks to the efforts of the Center for Media and Democracy and the Bioscience Resource Project. The documents, which date back to the 1920s, illustrate the lengths to which the chemical industry has gone to cover up its misdeeds, and they also provide evidence of governmental collusion.

The papers can be found on the PoisonPapers.org website.

This resource consists of more than 20,000 pieces of regulatory agency correspondence and documents over nearly a century, and they show that regulators and the industry not only knew how toxic their products were but also worked together to keep the public from finding out about it.

Many of the documents were obtained throughout the years by activist and author Carol Van Strum. They include internal memos, strategic discussions, internal scientific studies, sworn testimonies and meeting minutes.