Photo illustration by Tom Twigg / Grist The red Honda Fit from a local car-sharing service pulls into the driveway of a suburban San Francisco Bay-area home, and two clean-cut young guys in khaki jump out and start unloading a Ghostbusters array of gadgets -- something resembling a giant black megaphone, a glowing tube attached to a video screen, and a handheld device that looks like it was pilfered from Dr. McCoy's sick bay. Meet the "greenup" team from Sustainable Spaces, a four-year-old San Francisco firm that conducts residential energy audits and energy efficiency retrofits to shrink a home's carbon …
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Todd Woody is an environmental and technology journalist based in California who writes for The New York Times, Quartz, and other publications.
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