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Worldchanging.com founder Alex Steffen offers
a fast-paced round-up of radical (but possible) answers to
our planet's greatest challenges, ranging from green cities
and buildings, to digital collaboration tools, to ingenious
tools for the developing world (flowers that detect
landmines; straws that purify water as you drink;
merry-go-rounds that pump water using the energy expended by
children at play).
As Western-style consumerism spreads to developing
countries, we must re-imagine our world - a process he
believes is slowly happening in such cities as Vancouver and
Portland, Oregon, and also in the developing world, where
new technologies and new forms of collaboration are
combining to solve 21st-century problems.
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