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http://www.permies.com I'm against the use of newspaper or cardboard in gardening or horticulture. But I'm in a minority. Many of the big names in permaculture / sustainable agriculture favor the use of newspaper or cardboard. Newspaper or carboard are often uses as part of a technique called "lasagna gardening". The idea is to use it as a mulch that will smother everything underneath it. Most people think that the concern might be the use of icky ink. But my primary concern is the chemical process to get the lignins to come out of the wood to make paper. A concern with the carboard is the chemicals in the glue. I tell a story of a tree that is doing poorly and then find newspaper under the soil. Five years have passed and the newspaper is still in tact and kept the water away from the tree roots. music by Jimmy Pardo