which activity is least likely to increase greenhouse gases in the atmosphere?
using fertilizers on crops
using non-chlorofluorocarbon refrigerants
running a gasoline-based generator
driving in a bus

a- all cells come from pre-existing cells

well for one plants are always the producer, so a is the answer. a wolf is more of the consumer(predator) and the deer is the prey so i know those two are out of the question. also mushrooms are fungi/fungus so a is the producer.

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.