There's also a section devoted to "green" roofs, both literally and figuratively, those planted to reduce New York's "heat-island" effect and storm-water runoff.

WSJ: Open-Air Status Symbols

Greenery is critical to counterbalance the "urban heat island" effect from hotter, drier summers, when night-time temperatures remain high because of heat retained by brick and tarmac.

BBC: Time to leave the comfort zone

The new regulations in Massachusetts, which will take effect in June, will promote smaller and more efficient combined-heat-and-power biomass facilities that require less fuel and have lower net carbon dioxide emissions over time.

FORBES: Massachusetts Addresses "Biomass Loophole" and Limits Subsidies

To better predict the orbits of hazardous objects, this group is looking at the Yarkovsky effect, a force created when the asteroid absorbs sunlight and re-radiates it as heat.

CNN: So, about that asteroid near Earth ...