Crazy' tree planter greening Sao Paulo concrete jungle In just over two decades, Brazilian Helio da Silva has single-handedly planted about 40,000 trees in the urban jungle that is Sao Paulo. His ...

In just over two decades, Brazilian Helio da Silva has single-handedly planted about 40,000 trees in the urban jungle that is ...

The former food industry executive says he was called "crazy" when he started his quest to transform what used to be a hangout ... "Helio da Silva, Tree Planter." ...

The former food industry executive says he was called "crazy" when he started his quest to transform what used to be a hangout ... of 160 species stretched over 3.2 kilometers (two miles) long ...

The former food industry executive says he was called "crazy" when he started his quest to transform what used to be a hangout for drug users between two busy avenues. Today, there stands the ...