Dr. Roberts argues that the drought situation of 1983 begins to support the thesis that man-induced changes in global ecology are at least a significant part of increasing desertification. Walter Orr Roberts informal series, "Provocations." Each issue consists of provocative comments related to s... Show moreDr. Roberts argues that the drought situation of 1983 begins to support the thesis that man-induced changes in global ecology are at least a significant part of increasing desertification. Walter Orr Roberts informal series, "Provocations." Each issue consists of provocative comments related to scientific issues that mostly focus on weather, climate the sun, or near space, with the aim of creating a forum for discussion. Show less
