From four wheels to six: residents of Bogotá are encouraged to leave their cars at home and get on the TransMilenio bus rapid transit system in a bid to make transportation greener.
Located on hill slopes, the city of Medellin uses cable cars to make local transport more efficient.
Climate change has worsened the spread of malaria in Kenya. But an awareness campaign is paying off.
The bark of the Prunus Africana tree contains ingredients that fight illnesses like prostate cancer. Green groups and local residents are working together to stop illegal deforestation and promote sustainable harvesting.