Your letters.

This document is a collection of letters from readers published in the New Scientist. The letters cover a range of topics, including the use of AI to address climate change and biodiversity loss, the validity of scientific theories regarding sperm propulsion, concerns about the impact of chatbots on critical thinking, the influence of language on mindset, the care of plants without the use of sprays, the historical prevalence of zoonotic pathogens and their potential for transmission to humans, the impact of the closure of a car factory on South Australia's electricity grid, the role of open debate in exposing falsehoods, and the consumption of ultra-processed foods. [Extracted from the article]