 The author further asserts that many alternatives already exist, and that with time they will replace fossil fuels as an energy source.Concerning other resources, such as metals, Lomborg suggests that based on their price history they are not in short supply.Examining the challenge of collecting sufficient amounts of water, Lomborg says that wars will probably not erupt over water because fighting such wars is not cost-effective (one week of war with the Palestinians, for instance, would cost Israel more than five desalination plants, according to an Israeli officer).