True or False? 1. Carbon is a nutrient needed by both plants and animals for growth.
T or[F?
2. Nutrients do not cycle through an ecosystem.
T or F?
3. Carbon can be found in the atmosphere (layer of gases surrounding a planet).
T or F?
4. Carbon can be found in the earth's crust.
T or F?
5. Carbon cannot be found in earth's oceans.
T or F?

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.

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.