What percentage of the human population of the world does not have reliable access to clean water? a 20% b 80% C 70% d 30%

The correct answer is a) 20%.<br /><br />According to the World Health Organization (WHO) and the United Nations Children's Fund (UNICEF), approximately 20% of the global population, or about 1.2 billion people, do not have access to safe and clean drinking water. This lack of access to clean water is a significant public health issue, as it can lead to the spread of waterborne diseases and other health problems. Efforts are being made by various organizations and governments to improve access to clean water and sanitation facilities, but the problem remains a major challenge, especially in developing countries.