0 a system for controlling pollution. Companies and governments can buy or sell licences to produce carbon dioxide. --
1 a system for buying and selling the right to release carbon dioxide into the environment. Companies or countries agree a limit on the amount of carbon dioxide that can be produced, then can buy the right to produce more than this from companies or countries that produce less: --
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
Vi kan slutföra det steg för steg hur lång vägen än är och den kan inte slutföras hur kort vägen än är om du inte ens markerar ditt fotavtryck.