As part of our continuing series Global Cities: Challenges and Choices, contributor Barry Weisberg talks with Jorge Wilheim and Jaime Lerner, two Brazilian legends in the fields of architecture, urban planning, and sustainability about their philosophies and careers.

And on Global Notes, author Damian Platt tells Jerome and Radio M host Tony Sarabia about AfroReggae, a group that uses music to fight violence in Brazil’s toughest favelas. Platt camped out in Rio’s slums to co-write the book “Culture Is Our Weapon: Making Music and Changing Lives in Rio de Janeiro.”