This week we have chosen a piece of good news and a piece of bad news.
The bad news happened in Madrid. Madrid´s city council has been thinking about just letting 50% of the cars of the city into the city center, this is happening because the Spanish capital is struggling with the high levels of air pollution.
The council thought that they would let in cars that finish with even numbers on their number plates on even days and the cars that finish with odd number plates would be allowed in on odd days.
Far away in San Fransisco the U.S city has required that certain new buildings have to be built with a green roof, this means that there will be plants on the roofline.
This new law will be started in January and new buildings will have to incorporate 15 - 30% of roof space with solar panels, green roofs or a blend of both.