The Earth's ozone layer got destroyed by the sun and people are starting to use small storage containers of water called water bucks as currency.
Water bucks can be collected by water buck bank resource associates and the water for water bucks can be found at any small rivers or ponds that haven't been completely evaporated by the sun. Water bucks can be used to either get fluids or buy other things that you need like shelters, food, furniture, etc.
You can get more water bucks at the water buck bank and getting an account, downloading an app called Water Buck Store or getting a job which are a water buck bank resource associate and a zookeeper to help take care of the animals for food. You can only get water bucks at the Water Buck Bank and only out of your account which you can only have one account per person.