In 1987, the UN Brundtland Commission defined sustainable development as "meeting the needs of the present without compromising the ability of future generations to meet their own needs." (Report of the World Commission on Environment and Development.)
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What pillars do the images represent? Sometimes people call them the 3 E's or the 3 P's. What do you think they are?
Images: Jacob_09/Shutterstock (2021). Ten ways to celebrate Earth day from home. The old farmer's almanac, April 21, 2021, https://www.almanac.com/content/earth-day-date-activities-history; Littleton-Lopez, Vanessa (2016) Promoting social equity in local government, PA Times, American Society for Public Administration, May 20, 2016. https://patimes.org/promoting-social-equity-local-government/; Understanding World Economics, https://www.ted.com/playlists/272/understanding_world_economics
