For now, at any rate, the problem stems more from the growing number of fishermen than from falling numbers of fish.

ECONOMIST: The Mekong river

She insists the practice largely stems from fear, not arrogance, due to the high number of cyclists killed each year by heavy goods vehicles turning left at junctions, and says ministers should concentrate on tackling such deaths if they really want to make the roads safer.

BBC: Is dangerous cycling a problem?

This trend, according to Christopher Leinberger, an urban planning professor at the University of Michigan and visiting fellow at the Brookings Institution, stems not only from changing demographics but also from a major shift in the way an increasing number of Americans -- especially younger generations -- want to live and work.

CNN: Is America's suburban dream collapsing into a nightmare?