Hello katonca.
I found an article which suggests looking to see what's grown in town and city parks, or on roundabouts, etc., as the more hardy plants will be chosen for that purpose. I know plane trees are grown in London as they are one of the few trees that do well in polluted air. I expect you will find that tender plants won't do well. You'll need the real "toughies". Any of the wild flowers and plants that grow in your area should be of interest, too.
Check out some of the gardening threads on-line as I'm sure many people have the same problem as you.
(This site took some time to load and, in case it doesn't, I post an extract mentioning plants
http://www.cababstractsplus.org/goog...No=20053036177
"English Title: Choice of pollution-resistant garden plants.
Personal Authors: Zhu MeiYing, Zhang Pin, Lian FangQin, Xiong MeiLan
Author Affiliation: College of Land Resources and Environment, JAU, Nanchang 330045, China.
Document Title: Acta Agriculturae Universitatis Jiangxiensis, 2004 (Vol. 26) (No. 6) 941-943
Abstract:
The response of Dianthus superbus, Iris tectorum, Zephyranthes candida, Reineckea carnea and Sedum sarmentosum to Cu, Cd and Pb was evaluated in pot experiments. D. superbus showed the best repairing effect on soil polluted by Cd. R. carnea showed the best repairing effect on Cu-polluted oil, while S. sarmentosum showed the best repairing effect on Pb-polluted soil. In heavy metal-polluted soil, D. superbus showed the highest repairing effect, while Z. candida produced the least.
Publisher: Jiangxi Agricultural University
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CAB Abstracts contains a wealth of information on the following items that are related to the abstract above:
cadmium, copper, heavy metals, lead, metal tolerance, phytotoxicity, pollutants, pollution, tolerance, Iris tectorum, Reineckea, Reineckea carnea, Saxifragales, Sedum sarmentosum, Zephyranthes candida, Dianthus superbus, Iris, Liliaceae, Sedum, Zephyranthes."
Take a look at these, too:
http://property.timesonline.co.uk/to...icle622203.ece http://www.bbg.org/gar2/topics/essays/2005fa_urban.html
And there's a "pollution resistant" plant mentioned here:
http://www.gardenplansireland.com/ar...article19.html
Let us know if you come across anything of interest.
Penny