Many potting mixes contain peat, dug from bogs that build up by only about a millimeter a year. According to the UN Environment Programme, peatlands cover just 3 to 4% of the world's land yet hold up to a third of its soil carbon, twice as much as all the world's forests. Once drained and dug up, they release that carbon. Peat-free mixes avoid the problem.
Chlorine on its own is fairly gentle. But when it combines with urine, sweat and other grime from swimmers, it forms chloramines, which cause stinging eyes and that classic 'chlorine smell'. A well-kept pool barely smells at all. Shower before you swim and never pee in the water.
Muscle mass slowly shrinks with age, putting independence at risk. But in 1990, a study had nursing home residents aged 86 to 96 train their legs for eight weeks: their strength more than doubled. Muscle responds to training at any age. Getting up from a chair without using your hands is already an exercise.