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Sleeping giant?

For now, scientists are working quickly to answer pressing, yet basic questions, such as how much methane could be released as a result of warming, and when. "We first need sound science to use as a basis for understanding what the methane emissions are and how they may be changing right now," says Ruppel. In the meantime, how concerned should we be about the possibility of climate catastrophe resulting from methane? "It's probably safe to say that we don't know," says White. "But if there's a ticking bomb in the room, you'd like to know the possibility of it going off. The fact that it's there at all is unnerving."

- A sleeping giant? Nature.com, March 5, 2009.

3. Marcelo Ebrard was the mayor of Mexico City from 2006 to 2017, the time when that city gained a reputation as a dynamic, sophisticated world capital, even while the country’s image as a place of dark and ever deepening crisis, corruption, and violence steadily worsened. He implemented numerous urban quality-of-life initiatives—a wildly popular bike-sharing program, an expansion of the rights of sexual minorities, a reduction of crime, and an attack on the air-pollution problem (an initiative in which the Clinton Foundation was involved). As Guillermo Osorno, a writer and editor of the Mexican digital journal Horizontal, told me in an e-mail, Ebrard also “gave the city a unique narrative as a progressive city as opposed to the conservatism and political backwardness in other areas of the country.”