There are many exciting ways to travel around our planet.

Some of them use no power.

Some are just good fun.

Some are becoming more efficient.

Flying in a modern jet can be as little as 2 litres per 1oo km per passenger.

A good car can be down to 4 litres per 100 km or less than 1 litre per 100 km per passenger.

But we can do better.

Electric cars may be a way , but the power still has to be generated somewhere to charge the batteries.