"This is what I should do. I've been living here for two years and only met my neighbours on the doorstep, when they were complaining about the noise .. :-("February 1 2012 on Organise a neighbourhood meet & greet.

"This idea seems easy, but it isn't. I think this is really helpful to make the world a better place. Just do not spoil food. It is terrifying how much we waste"February 1 2012 on Do not spoil food for at least 1 month. Buy only food you will eat...

"Good idea, it has already been done a lot of times, but still: the outcome can be a hugh villa (I heard...)"February 1 2012 on Don't spend money. Just exchange things, talent, services for...

"Dear Maarten, this is not a challenge, you already do this"February 1 2012 on Smile to everybody you have eye contact with.

"I really don't think you could do this, but I'm just dying to see you trying!"February 1 2012 on Live during one month without producing any garbage. And document it.