National Geographic is celebrating Earth Day 2013 with some remarkable photos, stories and information intended to inspire and perhaps galvanize us all into more environmentally friendly ways of being. Visit the site, learn more with a Google Hangout.
Find current coverage of other Earth Day 2013 activities with a search in Summon. For a historical perspective, check out this book:
Before Earth Day: the origins of American Environment Law 1945-1970.
This is a good week for re-reading Rachel Carson's Silent Spring. This edition features an introduction by Al Gore.