A company logo sits on a sign in a flower bed outside Syngenta AG's headquarters in Basel, Switzerland, on Wednesday, Dec. 23, 2015. Syngenta Chairman Michel Demare said his company is in "advanced, formal and intense negotiations" with competitors about a possible combination, as the global agrochemicals industry consolidates and the merger of DuPont. Co. and Dow Chemical Co. adds pressure on others to review their standalone strategy. Photographer: Michele Limina/Bloomberg via Getty Images
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