A savanna or a grassland biome is home to a number of natural resources, including water, livestock and lumber in tropical savannas, and coal, oil, wheat, gas, oats and livestock in temperate savannas. Some grasslands are also found to have mineral deposits, such as iron, mercury, nickel and uranium.
Northern Australia is home to the largest savanna in the world. It stretches 1,250 miles across the continent and accounts for more than a quarter of all the remaining grasslands that once thrived over Asia, Africa and South America. The Australian tropical savanna is rich in metal deposits, making it the largest money generator in that part of the country. Metal resources mined in the tropical grassland include silver, gold, tin, nickel, copper, bauxite, magnesite, uranium and manganese. Phosphate rock, diamonds, limestone and silica are also mined in the savanna, as are petroleum and coal.
The vast expanse of grassy vegetation in eastern South Africa supports nearly 2 million herbivorous mammals and over 500 species of birds. The grassy landscape is also the location of large deposits of gold and coal. The Eurasian and North American savannas are known for having shale formations of petroleum and natural gas. The ever-increasing human habitation, extensive mining and natural energy explorations threaten to irreversibly modify and damage the natural ecosystem of savannas around the world.