Your editorial warning that extreme events are likely to become a new and dangerous normal (The heatwave in Britain is part of a large and dangerous pattern, 10 July) highlights that what the UK can most effectively do in response is to plan to adapt. While decarbonisation across our economy and society is vital and the UK must improve its commitments on a range of fronts, we are also a highly populated island exposed to diverse and complex weather and climate risks from storms and floods to heatwaves and drought.

Tuesday’s report by the National Infrastructure Commission makes the economic case for early, planned adaptation clear: it is way cheaper than responding to emergencies. This summer the government publishes its latest national adaptation programme. The first programme was spread too thinly and progress against it was hard to quantify. The latest version must establish an ambitious, targeted and measurable plan of action which ensures society is resilient to the worst the weather can throw at us in coming decades.

Alastair Chisholm

Director of policy, Chartered Institution of Water and Environmental Management

• You shouldn’t waste time criticising Donald Trump. He has had little effect on greenhouse gas emissions. China is producing twice as much carbon dioxide (CO 2 ) as the USA, and is also pumping out illegal greenhouse gases, like CFC-11, which were banned by the Montreal protocol (China is source of illegal CFC-11 eroding ozone, 9 July). Since everyone agreed that atmospheric CO 2 had to be kept below 450 ppm, China has gone from producing 10% of global emissions to producing 28%, and intends to continue increasing its output until 2030.

Robert McCartney

Farnborough, Hampshire

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