They also asserted that the bone smashing was a sure result of human activity and not an occurrence of nature. (techtimes.com)
A world - renowned scholar, he focused on the impact of human activities on climate change in his teaching and research, and his contributions extended well beyond our campus. (news.stanford.edu)
Otherwise we're simply monitoring the effects of human activity in our neighborhoods, without any reference to the overall picture, about which we presently know damn little. (wattsupwiththat.com)