A long-running series invites readers to answer other readers' questions on subjects spanning trivial fancies to profound scientific and philosophical inquiries.
One reader from Alnwick, Northumberland, posed the question: if consumer capitalism continues at its current rate, will the planet eventually reach a point where there is literally no physical space left for all the goods that have been created?
Readers are invited to submit answers to the question as well as pose new questions for consideration. Submissions can be posted below or sent to nq@theguardian.com.
A selection of responses will be published the following Sunday.