One of the benefits of encouraging wildflowers and wildlife at stations can be seen in this picture.
Volunteer David Davies took this picture of a bee, its legs laden with pollen, taking off from a poppy at the inner city station of Homerton in Hackney, London.
Bees are becoming so rare in Britain that £10 million worth of scientific study was announced this week to try to find a solution.
Maybe the Friends of Homerton Station have found the solution already.
They are inviting people to join them on Saturday 3 July 2010 for the next gardening/plant identification session.
The Friends will be meeting at 09.30 to trim back the wildflowers on the north embankment.
The gardening will be followed by a session at 10.15am with John of the Grass Roof Company on identifying the wildflowers.
There will also be a get-together over coffee to discuss ideas for planting wildflowers on the new embankment areas.
Friends of other stations might be encouraged to follow Homerton's success in caring for wildflowers and thus encouraging biodiversity.
Information from Friends of Homerton Station
More pictures
Fran Monks portrait of Hackney
BBC pictures
Bee crisis