Cleaning up polluted soils is often possible, but is very expensive. It is important to take whatever steps are possible to prevent the damage occurring in the first place.
In our own families we can help by checking to see if the family car will run on unleaded petrol, and making car journeys only when necessary. We should also dispose of waste products responsibly after changing the engine oil. We should recycle everything we can and make garden compost of all suitable vegetable and plant waste. Try to put as little as possible in the dustbin for disposal by the Council to landfill.
Many people buy organic foods, grown without the use of artificial fertilisers and pesticides. We need, perhaps, to be less concerned with the perfect size and shape of the fruit and vegetables in our supermarkets, and more concerned about the methods used to achieve this perfection!