Water usage will become a big issue. Especially if the planet keeps warming up, which could see many glacial fed rivers drying up. Impacting millions of people’

Water usage will become a big issue. Especially if the planet keeps warming up, which could see many glacial fed rivers drying up. Impacting millions of people’s across the globe. There’s several things that needs to be worked out very soon: - Sustainable water desalination in arid countries that doesn’t consume hydrocarbons (Solar-Thermal desalination? Nuclear desalination?). - Better reuse of human waste for the growing of food. Currently most food is grown with artificial fertilisers, which aren’t sustainable in the long run. We need to make better reuse of our waste so that the amount of phosphorus (Another resource soon to peak), potassium, and nitrogen from artificial or mined sources can be reduced. - Better waste water and grey water management systems to recover domestic waste water for use in industries and farming.