The document discusses the relationship between the environment and health. It classifies the environment into internal and external factors and notes that environmental pollution from industry, agriculture, and other sources can negatively impact health. Specifically, water, air, light, sound, housing, animals, and insects are environmental factors that can affect human health if polluted. The document also provides methods for purifying water on small and large scales, including boiling, chemical treatment, filtration, storage, and chlorination.

2.  Environment-
A large number of diseases are related to
environment like Water, Air etc.
 Classification of environment-
1. Internal environment.
2. External environment.

3.  Environment and health-
Environment has a direct impact on health.
The environmental factors which can
affect health are water, air, light, sound
housing, animals, insect etc. it is known that
industrial progress, modern agricultural
methods etc. have lead to environment
pollution. This intern has an adverse effect
on health.

4. Purification of water
 On small scale-
1. Boiling.
2. Treatment of chemical.
3. Filtration.
 On large scale-
1. Storage.
2. Filtration.
3. Chlorination.

24. THANK
YOU!

26. REFERENCE
1. https://www.slideshare.net/daisymaevaleros
o/health-and-environment.
2. https://www.slideshare.net/RizwanSa/enviro
nment-and-health.
3. https://youtu.be/NHySQH_5B6s.