Conversation so far:
Why was Norman Borlaug criticized?
Norman Borlaug's work has been criticized for bringing large-scale monoculture, input-intensive farming techniques to countries that had previously relied on subsistence farming.
What was a criticism of Norman Borlaug from an environmentalist?
the decreased biodiversity from planting a small number of varieties; the environmental effects of inorganic fertilizer and pesticides; the amount of herbicide sprayed on fields of herbicide-resistant crops

Question: What did his critics say?
Self-contained rewrite: What did Norman Borlaug's critics say?