Readers reply: what happens to the soil under heavily concreted environments?

The long-running series in which readers answer other readers' questions on subjects ranging from trivial flights of fancy to profound scientific and philosophical conceptsWhat happens to the soil under heavily concreted environments such as central London? Is it still full of worms and is the soil still rich in nutrients and life? Alison GivneySend new questions to nq@theguardian.com. Continue reading...