Hurricane Irma | Doctor Foster | Soybeans | Veganism | Canals v roads

Hurricane Irma has devastated many Caribbean islands (Report, 6 September). Sadly, there is little that can be done about the tragic loss of life. However, there would be no better course of action than sequestering the billions in evaded tax residing in many of the territories to fund the vital reconstruction needed to rebuild indigenous people’s lives.
Jan Wiczkowski
Prestwich, Greater Manchester

• Lucy Mangan thinks nitric acid is enough on its own to dissolve a wedding ring (Last night’s TV, 6 September): it isn’t. But if you look carefully at the sequence in Doctor Foster, it’s clear that she is also using a second unspecified liquid, presumably hydrochloric acid, to make aqua regia, which will dissolve gold. At last, my training in chemistry has proved useful!
Dr Richard Carter

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