From Paris to Athens, and Lisbon to Berlin, Europeans are enduring a prolonged and punishing summer heatwave amid global warming.And rising right alongside the blazing temperatures are China’s exports of air conditioners (ACs) to the continent, with a nearly 60 per cent jump by volume in July, compared with the same time last year, according to Chinese customs data.The Spanish capital of Madrid kicked off the week under a yellow alert – the third-highest heat warning on a four-tier scale –...