Smart ide mod trafik og forurening

I Barcelona tester de en ny metode til at gøre dele af byen næsten bilfri. Det gør luften renere og giver mulighed for at bruge vejene til andre formål.
BBC
I Barcelona tester de en ny metode til at gøre dele af byen næsten bilfri. Det gør luften renere og giver mulighed for at bruge vejene til andre formål.
BBC
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