The Power Pallet ... generates electricity from corn cobs, wood chips, coconut shells and other kinds of cheap, dense biomass. Although it costs $24,000 to $34,000, the Pallet can churn out electricity for less money than the diesel generators that power businesses across the developing world, while coughing up less pollution. And when used properly, the Pallet is carbon negative," pulling more heat-trapping carbon dioxide out of the atmosphere than it pumps back in. Its very existence is almost an accident. Years ago, the tinkerers who would eventually found All Power were ... building flame-throwing robots for Burning Man. Berkeley officials objected and convinced Pacific Gas and Electric Co. to cut the power [to their property]. As a result, Jim Mason, All Power's CEO, developed a keen interest in generating electricity off the grid. "We got shut off and decided to hack climate change," Price said. Now All Power has morphed into one of the Bay Area's unlikeliest exporters, installing 700 machines in more than 30 countries worldwide. Its 30 employees assemble one or two Pallets each week, all in Berkeley. And All Power is one of a handful of American companies displaying their products at this week's international climate conference in Paris. The Pallet uses gasification, a process more than a century old, that subjects carbon-rich organic material to high heat. What's left of the original material becomes biochar, which can be mixed into soil as fertilizer. That waste product - biochar - is how the Pallet achieves carbon-negative status.