Why flowers have lost their scent - Pollution limits scent to 20% -30% of previous range ...

Why flowers have lost their scent - Nature, Environment - The IndependentPollution is stifling the fragrance of plants and preventing bees from pollinating them – endangering one of the most essential cycles of nature, writes Environment Editor Geoffrey Lean | Sunday, 20 April 2008

Pollution is dulling the scent of flowers and impeding some of the most basic processes of nature, disrupting insect life and imperilling food supplies, a new study suggests.

The potentially hugely significant research – funded by the blue-chip US National Science Foundation – has found that gases mainly formed from the emissions of car exhausts prevent flowers from attracting bees and other insects in order to pollinate them. And the scientists who have conducted the study fear that insects' ability to repel enemies and attract mates may also be impeded.

The researchers – at the University of Virginia – say that pollution is dramatically cutting the distance travelled by the scent of flowers. Professor Jose Fuentes, who led the study, said: "Scent molecules produced by flowers in a less polluted environment could travel for roughly 1,000 to 1,200 metres. But today they may travel only 200 to 300 metres. This makes it increasingly difficult for bees and other insects to locate the flowers." ...