 Food writer Michael Pollan does not oppose eating genetically modified foods, but supports mandatory labeling of GM foods and has criticized the pesticide-heavy monoculture farming enabled by certain GM crops, such as glycosphate-tolerant ("Roundup-ready") corn and soybeans.He has also expressed concerns about biotechnology companies holding the intellectual property of the foods people depend on, and about the effects of the growing corporatization of large-scale agriculture.To address these problems, Pollan has brought up the idea of open sourcing GM foods.