The Environmental Health is defined as "the relationship between human health and the environment that surrounds the human being" or human health would be affected by the quality of the environment.
Therefore, environmental hygiene, it means "the relationship between human health and the environment around human body" therefore, human health can be affected by the quality of the environment.
Therefore, Environmental Hygiene, it means that "the relationship between the health of the Human Environment." Therefore, we are all around the human health of human beings, it would be the quality of the environment