Children's University: What is hydrogen? And can cars run on it?

Many cars still run on petrol or diesel. And many houses are still heated with oil or gas. This pollutes the air - which is bad for our environment. This produces CO₂, a gas that makes the earth warmer and warmer. This warming is called climate change: there is more frequent heavy rainfall, but sometimes it also rains too little and this leads to drought.

To prevent this from getting worse and worse, we need other sources of energy - so-called renewable energies. This means: energy that comes from natural forces such as wind, water or sun and does not pollute the environment.

But how can we actually turn wind into electricity? And how does water help us to power machines? You can find out with exciting experiments and simple explanations in the fall series of the Siegen Children's University.