Alex Dunae

Like others in the so-called good-food movement, Allen, who is 60, asserts that our industrial food system is depleting soil, poisoning water, gobbling fossil fuels and stuffing us with bad calories. Like others, he advocates eating locally grown food. But to Allen, local doesn’t mean a rolling pasture or even a suburban garden: it means 14 greenhouses crammed onto two acres in a working-class neighborhood on Milwaukee’s northwest side, less than half a mile from the city’s largest public-housing project.

Global warming is moving much more quickly than scientists thought it would. Even if the biggest current and prospective emitters – the United States, China and India – were to slam on the brakes today, the earth would continue to heat up for decades. At best, we may be able to slow things down and deal with the consequences, without social and political breakdown. Gwynne Dyer examines several radical short- and medium-term measures now being considered – all of them controversial.