There is joy
Do you know that great feeling when your flat isn't full of things you don't really need? You don't have to buy things just because other people have them - this will save your money and the planet.
Buying new things is often unnecessary and expensive - skis, clothing, cars, bicycles and many other things can be borrowed, exchanged, repaired or bought second-hand.
The manufacture and transport of every item often uses a large amount of energy, water, materials and other resources. For example, the manufacture of one cotton shirt requires 2,700 litres of water - that's how much one person drinks in three years. (1) The general rule is: The less we buy, the less natural resources we deplete.