About 2.4 billion people worldwide lack access to adequate toilet facilities, and hundreds of children die every day from preventable, sanitation-related diarrheal diseases. But water scarcity—a worsening problem in many low-resource environments—is one factor that makes it difficult to meet the need for clean, functioning toilets. More.....                                                                                               Source: By Viviane Callier scientificamerican.com                                               November 18, 2019