There is no real cash than the one which is printed, the rest of the cash is a piece of code that exist on hard drive’s. I couldn’t imagine how many trees would be expected to be cut down when a trillion cash is in need. Now that’s a lot of money with many trees expected to be cut. Here comes the need for digital cash where you basically don’t print but code to be present on system’s or hard drives. These digital currency has taken names in the market place in the form of cryptocurrencies and requires a lot of resources like cpu and memory to mine a lot of them when the need arises. Learning to program with algorithms help’s you to generate your own digital currencies and this gives you a freedom to create cash which may be authentic or may not be depends on the demand of your currency. This indirectly saves a lot of forest life and make our planet evergreen by reducing the number of trees being cut. Going green is the best foot forward by making digital currencies and learning to code them can make our planet Earth more habitable. Learn to code.