Telegraph: A study of two varieties of apples grown in Japanese orchards has revealed a significant number of changes caused by global warming over the past 30 to 40 years. Changes in temperature and rainfall have affected when the trees bud and their flowers bloom. As a result, the apples are less acid, which makes them taste less sour. The fruit has also become softer and less likely to develop a condition called “watercore,” which limits its shelf life. Because the changes have been gradual, most consumers will not have noticed them. But as the effects of climate change become more pronounced, so too may the changes in the apples.