Just navigate the site and read the different areas and activities described. There you will find more information on why the activities have been chosen, and concrete instructions on how to contribute to each of them.
Justo naviga le sito e lege le differente areas e activitates describite. Ibi tu trovara altere informationes sur perque le activitates ha essite eligite e instructiones concrete sur como contribuer a cata de illos.