Some welcome the low emissions zone, others question it … and many despise it. But almost everyone agrees something has to be done about air pollution in London
While Rishi Sunak spouts pro-motorist rhetoric, Amsterdam, Paris and Edinburgh are leading the charge to be healthier cities, says Devi Sridhar, chair of global public health at Edinburgh University
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