Use the term "selectively permeable " in a sentence that demonstrates its meaning

First, you should know that selectively permeable is anexpression that defines the property of a membrane that allows some molecules to croos in and out it but not others. A sentence that you can use to let this term clear is that " slectively permeable or the croos of a membrane by only some substances but not other is the process that underlyas osmosis"

Answer : romans built laws to manage the pollution which was lead by smoke produced by the factories.

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.

The answer is one amu.