Hurricane Agnes flooding in MarylandJune 19, 1972: While reaching the Florida Gulf Coast as a relatively weak category one storm, Hurricane Agnes unleashes lightning and flooding that cause 122 deaths. At right, the effects of flooding in Maryland.

June 19, 2007: A study by the Netherlands Environmental Assessment Agency says that for the first time, China has surpassed the United States in carbon dioxide emissions. CO2 is the primary greenhouse gas.

June 19, 2010: In a gesture that will be taught for decades as a public relations move to avoid, embattled BP CEO Tony Hayward takes the day off in the midst of the worst oil spill in history to watch his yacht race off the south coast of England. The yacht finished fourth, and Hayward officially finished as BP CEO on October 1.

June 19, 2012:  The nonprofit group “Global Witness” reports that environmental activists, mostly working in developing nations, are being killed at the rate of one per week

June 19, 2012:  Thousands of activists, delegates, journalists and others descend on Rio de Janeiro to open the Rio+20 environmental summit amid low expectations.

Photo: Dennis F. Gillen, U.S. Geological Survey/Wikimedia Commons

This feature is compiled by Peter Dykstra, an MNN contributor and publisher of Environmental Health News and The Daily Climate.