Why tech isn’t always the answer — the perils of bionic duckweed

Tim Harford: always waiting for the next breakthrough can keep us from taking action now. Bionic duckweed is "a metaphor for a glorious future technology, which might sound good — but isn’t because it keeps us from acting." In the Financial Times, the Undercover Economist produces a 'taxonomy' of this concept, analysing why focusing too much in the future might actually prevent us from getting there.