What evidence is there to establish that the people of Mohenjodaro had a great concern for Sanitation and Town planning?

There is much evidence to show that the people of Mohenjodaro had a great concern for sanitation and town planning:

1. The Harappan cities followed a grid pattern. All important buildings were built on the high ground.
2. The streets crossed one another at right angles with rounded corners to allow carts to move easily.
3. Some Houses had courtyards and ranged from having one up to twelve rooms. Some Houses had double storey.
4. Every house had a bathroom, a storeroom, a kitchen, and a well. The kitchen had a fireplace, with an oven in the courtyard. Bathrooms had paved and slanting floors. Doors and windows opened on the streets.
5. The Harappan Drainage system was constructed on scientific lines. Each house drain was directly connected with the street drain.
6. There were manholes at regular intervals to facilitate inspection and maintenance of the drainage system
7. Trash was thrown into the dustbins.