There is no planet B
1. Environmental health is a multisectoral problem, which requires coordination and cooperation among the many different sectors in order to improve the lives of millions of people. Although humans have been aware of the crucial relationship between human health and the environment for millennia, there still is a tendency to separate health and environmental issues and deal with them independently. To protect the environment, promote human health, and practice sustainable development, this attitude must be changed. Despite global efforts made in recent decades, air pollution, water contamination, substandard waste management and lack of sanitation services, in addition to negative impacts of climate change, continue to pose environmental public health threats, especially in developing countries.