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Ground-level ozone pollution may affect human health , crop production and our wild plants . From facts communicated to me by Mr. Blyth , on the habits , voice , constitution , and structure of the humped Indian cattle , it is almost certain that they are descended from a different aboriginal stock from our European cattle ; and some competent judges believe that these latter have had two or three wild progenitors , - whether or not these deserve to be called species . These wild bees enhance the pollination efficiency of honey bees and may help buffer the human food supply from honey bee shortages . These wild oats need to be controlled as soon as possible to prevent yield losses due to competition . The problem is that we have degraded other species by domesticating them and are now extending this degradation to the remaining wild species by trying to " manage " them .