By Sareen Malik and Benazir Omotto The United Nations has warned that water shortages could affect 5 billion people by 2050. Credit: International Institute for Sustainable Development (IISD)

By Sareen Malik and Benazir Omotto The United Nations has warned that water shortages could affect 5 billion people by 2050. Credit: International Institute for Sustainable Development (IISD)