Your boiling-lean week
For one week, you are not to boil any excess water. Much of the water we boil in the kitchen is boiled unnecessarily. One litre of water...
Your no-throw week
During one week no food is to be thrown away. In most western countries about 30% of all edible food is wasted. That gives great...
Your shower-lean week
During one week, you must shower less than 30 minutes total. Swimming or showering in a public pool does not count in this mission. It's...
Try a smarter transportation
Get to an everyday activity in a smarter way at least once during the week. Go to some place you usually go to, like work, school, spare...
Let the water cool-week
Let your hot water cool before you pour it down the drain. Hot water holds a lot of energy. Don't pour it down the drain while still hot,...
Shut down and turn off-week
Turn off the lights and shut down devices you don't use. This may not go far to save the world, but at least it's easy to do.