In an effort to diversify the economy and make it less dependent on export goods, the government has pushed to increase tourism to Malaysia. As a result, tourism has become Malaysia's third largest source of foreign exchange, although it is threatened by the negative effects of the growing industrial economy, with large amounts of air and water pollution along with deforestation affecting tourism. The tourism sector came under some pressure in 2014 when the national carrier Malaysia Airlines had one of its planes disappear in March, while another was brought down by a missile over Ukraine in July, resulting in the loss of a total 537 passengers and crew. The state of the airline, which had been unprofitable for 3 years, prompted the government in August 2014 to nationalise the airline by buying up the 30 per cent it did not already own. Between 2013 and 2014, Malaysia has been listed as one of the best places to retire to in the world, with the country in third position on the Global Retirement Index. This in part was the result of the Malaysia My Second Home programme to allow foreigners to live in the country on a long-stay visa for up to 10 years. In 2016, Malaysia ranked the fifth position on The World's Best Retirement Havens while getting in the first place as the best place in Asia to retire. A warm climate combined with a British colonial background makes it easy for foreigners to interact with locals.