FROGS IN TRANSITION: A recent study links urbanization and estrogenic waste with the development of hermaphroditic traits in frogs. Endocrine-disrupting chemicals that hail from suburban lawns and leaky sewer systems may cause male frogs to develop female parts.

IN THE RED: Dr. Damon Matthews of Concordia University calculated global CO₂ emissions to determine that each U.S. and Australian citizen has racked up a walloping $12,000.00 “emissions debt.” His calculations could contribute to an ongoing discussion about climate responsibility and the amount each nation should contribute to the Global Climate Fund.

BREAKIN’ IT DOWN: German researchers are redesigning drugs to make them more biodegradable. Exposure to ultraviolet light likely decreases the harmful effects pharmaceuticals can have on waterways, fish, and other aquatic creatures.

ON THE WING: According to a study released by the National Audobon Society, climate change may bring half of North America’s birds to the edge of extinction by the end of the century. Some 126 species may not successfully adapt to impending shifts in their ranges.

COMING OUT OF THE CAGE: McDonald's announced plans to use only eggs laid by cage-free hens. The decision will affect up to 8 million hens, and will have far-reaching implications for egg producers worldwide.