The natural resources of Wales have contributed substantially to the economic wealth of the United Kingdom from pre-Roman times to the present. Wales has a complex and varied geology with a wealth of natural minerals. Although Wales has been strongly associated with the coal industry, it has also been the world's leading supplier of slate and of copper at different times. The country lies along the western side of Great Britain and is buffeted by the prevailing South-Westerly trade winds which bring year round rain and wind but also maintain an equable temperate climate. The combination of climate and physical geography and geology have given rise to many different types of landscape and biomes rich in species variety.