Yesteray it was the battery day. There was in front of Prado´s museum. The purpose was because the batteries are one of the things that is slowest to degrate and it is very contaminate. Then they were a lot of activities and we do an experiment. We put a fish in a glass without batteries and other fish in a glass with a battery. Then we saw that the fish in the battery´s glass start die. After that Íker Casillas came to this "manifestation" and he told us about we must recycle and things like that. And to finish we saw a documental movie that it explained effects about bad recycle with batteries.
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