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The cartoon shows China's pesticide and fertilizer use has dropped in the past three years amid a compaign to ensure zero growth by 2020.(Xinhua/MengLijing, Zhu Huiqing)

The cartoon shows China's pesticide and fertilizer use has dropped in the past three years amid a compaign to ensure zero growth by 2020.(Xinhua/MengLijing, Zhu Huiqing)