Help! Part 3: Crossing Tail-Feather Length and Feather Color
Cross a P generation, SsWw with ssww. Assume the following F1 generation:
SsWw: 460
Ssww: 40
ssWw: 40
ssww: 460

How far apart are S and W?

you can have just about every answer you can think of

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.