Climate change will alter where many crops are grown

TOM EISENHAUER remembers driving through Manitoba, a province in central Canada, more than a decade ago. Surrounding his car were fields of cold-weather crops, such as wheat, peas and canola (rape). Dense staples such as maize (corn) and soya, which are more profitable, were few and far between. The view is very different now. More than 5,300 square kilometres have been sown with soya and around 1,500 with maize.