In 1987, the United Nations defined sustainable development as "development that meets the needs of the present without compromising the ability of future generations to meet their own needs". (accessed November 29, 2016, at http://www.un.org/en/ga/president/65/issues/sustdev.shtml)
According to the Natural Resources Canada website:
"Corporate Social Responsibility (CSR) is defined as the voluntary activities undertaken by a company to operate in an economic, social and environmentally sustainable manner." (accessed October 7, 2015)
Information about companies CSR efforts can be found in a variety of places. Companies report on and refer to their activities that fall within CSR in a number of ways. Sometimes their are specific CSR or sustainability reports or sections of their website. They also report on these activities in their annual reports and information sheets. There is also media coverage of companies that includes information about their CSR-related activities.
Many companies' produce reports that outline their environmental, community, and charitable programs. These can be stand alone reports, like the example below from the Saskatchewan Research Council, or websites with sections for each of their programs, like the example from PotashCorp. Sometimes it takes some investigation to find the information, which is also commonly under the heading of "sustainability" or "risk".