Gabino Martínez cleans the "Tláloc", the tank that filters dust from the rainwater collection system in his home in the Tehuixtitla neighborhood in the Xochimilco district in southern Mexico City. During the May to November rainy season local residents collect the water they use for washing, bathing and cooking, due to the lack of access to piped water. CREDIT: Emilio Godoy/IPS