Cleanliness impacts national development and health.
Cleanliness and national development:-
A clean and prosperous society is the need for the developed country.
A country should be well-sustained in it's needs of energy, and also, which is naturally satisfied along with the cleanliness. Thus, cleanliness impacts in the national development. 
Cleanliness and health:-
Cleanliness develops health. For example, you are in a house which is surrounded by the wastes, then you will be attacked by the diseases. In such a society, and a country, the people will be often diseased.
So, being clean and living in a clean society, will improve your health.
Thus, cleanliness impacts national development and health.
Hope this will help you.

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