But taking a radical new approach to food production is not just the preserve of activists.
CNN: Transforming England's towns into green and pleasant land
Once the preserve of gifted linguists, code breaking was soon invaded by mathematicians and scientists.
Mega-takeovers are likely to be the preserve of big, cash-generative groups with simple structures.
The days when fairy tales were the preserve of the animation department are over.
Science and chemistry concern all of us and must not remain the exclusive preserve of experts.
Those on low incomes often regard banks as hostile territory, the preserve of the wealthy.
Once the preserve of only elite athletes, adventure racing has become one of the fastest-growing sports on Earth.
South from here is Galgibag, the almost sole preserve of sea eagles, dolphins and endangered Olive Ridley turtles.
These markets are currently the preserve of Nokia and Ericsson, and they'd like to keep it that way.
But leading the way in consolidating suppliers in an industry is not the preserve of only big companies.
Fee increases may even insulate some schools from the downturn, by making them the preserve of the super-rich.
In February the government issued new guidelines for private investment in areas hitherto the preserve of the state.
This price barrier makes the coffee shop culture mainly a preserve of the upper middle classes in India.
Once the preserve of the super-rich, hedge funds are now marketed more widely.
Technology has made things like spotting anomalies in exchange rates no longer the exclusive preserve of hedge fund operators.
Opportunities currently available to all children would become the preserve of the rich.
The result: The top slots on draft boards are no longer the exclusive preserve of quarterbacks, tackles and pass rushers.
Now it is going back to the way it started, as the preserve of wealthy or patient families or partnerships.
This view, incidentally, is not the sole preserve of Christian Ireland, but was a fundamental part of the Hippocratic oath.
The changes would give people some input during the passage of legislation through Parliament, currently the preserve of MPs and peers.
Fed officials would credibly argue that the latter is the preserve of the U.S. Treasury, and they would have a point.
The research company concludes that Twitter, once the preserve of early adopters, geeks and news junkies, is now reaching new audiences.
But Matthew Rippon, a food researcher at Queen Mary, University of London, warned against seeing PFN as the preserve of small producers.
It is not, and cannot be the exclusive preserve of one religion.
They tend to grow quickly, perhaps because they have mastered industries that are mostly the preserve of richer, and therefore costlier, rivals.
Determining the reward is supposedly the preserve of Vanguard's independent board members.
Certainly there were big society parties in the 1920s and 1930s, he says, but they were the preserve of the ruling classes.
"We should not be intruding on the freedom of worship that is the proper preserve of the Churches not the courts, " he said.
Indeed, calligraphy is no longer the basic tool of intellectuals and officials but has become the preserve of professional artisans and amateur enthusiasts.
Back then, electronics and computers had no serious hope of becoming as mainstream as they are today, and were the exclusive preserve of hobbyists.
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