This photo taken on October 20, 2021 shows environmental activist Zhang Zhengxiang holding rocks that he says are polluted at an area which used to be a cement factory construction site near Dian Lake in Kunming, in southwestern China's Yunnan province. - 74-year-old Zhang is almost blind, has no education or money, but has successfully faced down hundreds of companies on the banks of one of China's most polluted lakes. - To go with AFP story China-environment-pollution, FOCUS by Patrick BAERT (Photo by Jade GAO / AFP) / To go with AFP story China-environment-pollution, FOCUS by Patrick BAERT (Photo by JADE GAO/AFP via Getty Images)
