Whether or not you believe in climate change, you can’t deny that the environment around some of the world’s poorest cities is being significantly hurt by human activity. This is the case in San Jose, capital city of Costa Rica, where high-yield agriculture in the countryside is resulting in dirty rivers, and rapid city growth is causing deforestation and soil erosion. For a child living in the slums of San Jose, this translates to an unstable home and little access to fresh fruits and vegetables.

Fact: The World Bank estimates that by 2013,
two-thirds of Latin America’s poor will be living in cities. That's a lot of crowds.
Another fact:
20 of Latin America’s largest cities are built on steep hills that are prone to landslides and flooding during the rainy season. One of these is San Jose.