When you summarize, you are condensing an idea (often a longer passage of text) and putting it into your own words. Summaries are most useful when you want to tell the reader the gist of the author’s idea or give a broad overview of the author’s concepts. You summarize sources in your paper in order to analyze or critique the idea presented by the original author.
Original text
Such intuition is even making its way, albeit slowly, into scholarly circles, where recognition is mounting that ever-increasing pressures on ecosystems, life-supporting environmental services, and critical natural cycles are driven not only by the sheer number of resources users and the inefficiencies of their resource use, but also by the patterns of resource use themselves. In global environmental policymaking arenas, it is becoming more and more difficult to ignore the fact that the overdeveloped North must restrain its consumption if it expects the underdeveloped South to embrace a more sustainable trajectory.
Princen, T., Maniates, M., & Conca, K. (2002). Confronting Consumption. MIT Press. http://login.library.sheridanc.on.ca/login?url=http://search.ebscohost.com/login.aspx?direct=true&db=nlebk&AN=70962&site=ehost-live&scope=site
Summary of source
Over consumption may be a more significant cause of environmental problems than is increasing population.
(Princen et al., 2002, p. 4)