Plants are photoautotrophs. what does this mean?
a) they are attracted to light.
b) they are the primary consumers of the biosphere.
c) they synthesize their own food from inorganic materials.
d) they use light energy to drive the synthesis of organic molecules from inorganic materials.
e) they generate oxygen.

A

Explanation:

because they can make their own energy making light

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.