The Globe and Mail reports in its Tuesday edition that Canadian companies have slipped in a global ranking of corporate sustainability practices, with half as many of Canada's largest companies placing in the top 100 as two years ago. The Globe's Janet McFarland writes that just six Canadian companies earned a spot in the Global 100 list of the world's most sustainable companies for 2017, a decline from nine in 2016 and 12 in 2015. The list ranks sustainability leaders using 14 environmental and corporate governance metrics, including energy usage, greenhouse gas emissions, leadership diversity, and safety performance. Canada has slipped because other countries have introduced various mandatory reporting requirements that have led to more disclosure and better practices around environmental issues. British regulators, for example, now require all companies listed on a British stock exchange to report on greenhouse gas emissions. Siemens AG of Germany ranked highest in the 2017 Global 100 report, followed by Norwegian financial-services company Storebrand ASA. Royal Bank of Canada is the top-ranked Canadian company in 37th place, followed by Enbridge in 39th and Sun Life Financial in 45th position.