The spread of the Zika virus may be the fault of climate change, says a senior United Nations official. “The spread of Zika, just as with Ebola, has sent a strong signal to the international community that there is a need for increased attention to the linkages between environment and health,” said U.N. Environment Program Director Achim Steiner. “Skin cancer. Lung cancer. Asthma. Lead poisoning. Mercury poisoning. Malaria. Ebola. Zika. The list of health conditions that can be linked to environmental pollution and degradation is long and growing,” a U.N. news brief says.