Before revision: Other external damage may be anthropogenic disturbance caused by clear-cut harvesting of trees, oil and gas extraction, poorly defined infrastructureinstallation, over grazing of livestock, ill-considered recreational activities , alteration of wetlands including dredging , draining, and filling, and other negative human impacts .
After revision: Humans are disturbing and damaging wetlands for example by oil and gas extraction, building infrastructure, overgrazing of livestock, overfishing , alteration of wetlands including dredging and draining, nutrient pollution and water pollution .