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Michael Le Page discusses record temperatures across the northern hemisphere ( 14 July, p 25 ). Here in Australia, climate modelling by the federal agency CSIRO and elsewhere has led to some sobering predictions for Australian cities in 2100. Prolonged conditions above 35°C and 85 per cent humidity are considered to be beyond human tolerance …

Luke Allen calls for "a single, integrated electronic record" for patient data ( 14 July, p 24 ). Given ethical, competent and efficient politicians, civil servants, medical professionals and IT contractors this would be a great idea. But we have none of these. We would get an expensive, insecure, inaccurate and buggy system, with records …

Chris Packham points out the role of agriculture in wildlife depletion ( 14 July, p 24 ). Farming has been blamed for years. Surely readers and viewers would be better stimulated into action by talking about the adverse effect of their gardening methods and pets. Garden centres have metres of shelves stocked with herbicides, pesticides …

Packham confuses cause and effect when he says intensive farming is to blame for the loss of wildlife. The cause is in the low prices paid by supermarkets to food producers, which lead to intensive agriculture. The United Nations Agricultural Outlook report published on 3 July predicts that prices will fall by 10 to 20 …

"So the space goat eating ice cream and telling me it needs a new lawnmower is OK... Phew!" Rob Z Tobor is somewhat reassured that we have started to uncover the true purpose of dreams ( 21 July, p 4 )

• In 2015, Norway's sovereign wealth fund was worth around $900 billion ( 21 July, p 27 ).

Discussing heat-related mortality, Michael Le Page says that more than a dozen deaths have been blamed on a heatwave in Canada ( 14 July, p 25 ). He concludes that without air-conditioners, large numbers of people will die in future heatwaves. Over 50 million people die in the world each year. It's estimated that around …

Katharine Hayhoe's perspective is a welcome Christian insight on approaches to climate change ( 7 July, p 40 ). It may be a surprise to some, but Christianity's prime directive is to love your neighbour as yourself . Looking at the current state of play, we have a big problem with this. In terms of …

What to do about plastic ( 19 May, p 25 )? On most roads in England I see miles of verge littered with thousands of pieces of plastic, much of which will end up in the rivers and sea. If governments are serious about plastic pollution, why not declare a month in which people bring …

Does anyone else question the wisdom of the UK's first spaceport being in the remote Sutherland area of Scotland ( 21 July, p 5 )? Consider the distance that payloads, fuel and staff will have to be transported, and uncertainty over any future relationship with Scotland, given that it may not remain a member of …