There are those that advocate immediate action to reduce the world's output of carbon dioxide at a cost of billions of dollars. Global initiatives to reduce global warming were promoted at the United Nations Earth Summit in 1992 and at other major international meetings. I maintain that the world's knowledge of global warming does not call for such global initiatives. The impact of an enriched carbon dioxide atmosphere on crop productivity is in large measure positive and leaves little doubt as to the benefits for global food security. The world should avoid mitigating this trend.
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