I was interested in how we engage the world. How do we use our skin as our eyes? If you read a cityscape or a landscape with just your mind, and not your body, it becomes like a picture or representation, not something you really engage with.

Having an experience is taking part in the world. Taking part in the world is really about sharing responsibility.

It would be wrong to say that the city of Berlin is not regulated. What I think is more interesting is to what extent a city creates a sort of safe haven for its users, so that people feel confident that the city works on their behalf.

I myself have already spent a third of my life in Germany, first in Cologne and then, since 1994, in Berlin.

I always try to make work that activates the viewer to be a co-producer of our shared reality.

By bringing Little Sun to Tate Modern and the London Olympics, I hope to realise an art project for those who typically have no access to global events of this scale.

In many rural areas of the world, local communities use kerosene for indoor lighting, which leads to asthma, poor quality of light, and the desperate cycle of oil-based products that continually degrade the environment.