Earth
Mean machines go green
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Issue 2674
Vaccinations and cool weather appear to have kept the cattle virus in check in Britain, but infected imports threaten a last-minute outbreak
Consumers will buy clean technologies if given the right incentives – it's up to governments to help create them
Stunning performance, awesome economy, no compromise. Electric cars are coming of age, says Jim Giles
Why do objects weigh what they do? It's all to do with the vacuum, apparently – Amanda Gefter enjoys an irreverent yet enlightening account of the secrets of mass