Location, climate, and natural resources significantly impact Australia's trade. Due to its remote location in the Southern Hemisphere, trade with nearby countries like China is important, with Australia exporting large amounts of natural resources to China in exchange for manufactured goods. Australia's warm climate attracts northern hemisphere tourists during their winter months. Domestically, climate and location allow Australia to grow grains inland in cooler regions. Much of the country has poor soil for farming but contains valuable mineral resources like iron ore, coal, gold and other metals, which Australia exports in large quantities and are critical to its economy. These natural resources also attracted many immigrants during the 19th century gold rush.