Plants to aid your environment

The cotoneaster only traps the pollution in its hairy leaves, it doesn't absorb it or alter it, so when it rains, all that trapped particulate matter will be washed onto the soil below. Unlucky gardener! And who has room for a 2 metre deep hedge in their front garden?

Funnily enough, although not 2m deep we have.  It's s about 4m x 1m in our front as a boundary, also one in the back.  They maybe good for the environment and the bees love it but P complains bitterly when cutting, he has to wear a respirator as their dust creates havoc with his asthma - hopefully it's only dust not pollution as they're away from the road.