The long-running series in which readers answer other readers’ questions on subjects ranging from trivial flights of fancy to profound scientific and philosophical concepts
Why do some places have dust and others not? Our house seems to need redusting days after a full deep clean, while a colleague told me she could leave her holiday home in Sweden for a year and come back to a spotless space. Is it the population density? Legacy of industrialisation? Car pollution?
James de Malplaquet
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