Topics such as trimming trees correctly and the impact of certain plants on the water flow of an area, are discussed and spread in the communities who take part in these free events.

other events include concerts, parades, presentations, and gatherings in lapa and santa teresa - on this day students promote awareness by planting flowers around rio and  on this day the united nations' billion tree campaign receives much attention in the local media.

rio de janeiro's official tree is the jequitibá-açu (Cariniana ianerensis), selected through a vote and one of the most important and endangered trees of the atlantic rainforest (mata atlântica) and typically carioca.

september is also the month of rock in rio - consistently featuring a lineup worthy of its remarkable history.