Countries with significant rainforest cover are generally not the world's richest. As such, rural people's day-to-day survival is dependent upon natural-resource use. Most local people living in and around forests never have an option to become a doctor, sports star, factory worker, or secretary; they must live off the land that surrounds them, making use of whatever resources they can find. Their poverty costs themselves, their country, and the world through the loss of biodiversity and ecosystem services like erosion prevention, flood control, water treatment, and fisheries protection.