Fukushima Dai-Ichii nuclear power complexJuly 25, 1967: Construction begins on what will become a six-reactor complex at the Fukushima Dai-Ichii nuclear power complex. Following the March 2011 earthquake and tsunami that crippled the Fukushima complex, the site becomes a symbol of the risks of nuclear power generation. At right, the No. 1 reactor is shown in 1999.

July 25, 1983: "WHOOPS!" The Washington Public Power Supply System earned its widely used nickname long before this date, when it became the largest municipal bond default in U.S. history. The $2.5 billion failure was the result of the WPPSS plan to power much of the Pacific Northwest through the construction of five nuclear power plants, four of which were never completed.

July 25, 1997: By a vote of 95-0, the U.S. Senate adopts the Byrd-Hagel Resolution. The measure states that the U.S. should not adopt any measure that exempts developing nations like India and China from global climate treaties. Though non-binding, the resolution effectively chills any chance that the Senate will ratify the Kyoto Protocol, the climate treaty that exempts developing nations from limiting production of greenhouse gases.

July 25, 2009: The Obama administration pledges to provide some support to Great Lakes states in controlling the spread of Asian carp, a voracious invader species that is spreading in local waterways and threatening the Great Lakes. These fish crowd out native species  and also have the dangerous habit of breaching out of the water when they hear boat noise, potentially injuring boaters and fishermen.

Photo: hige-daruma/Flickr

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