1)give any three aspects of atmosphere. 2)list at least three ways in which CFC 's are being commercially used for human benefits . 3)give at least three steps that should be adopted to minimize harmful effects of CFC 's. 4)why fossil fuels ate termed non renewable resources. 5)why solar energy is considered as inexhaustible resource.



2)cfc are commercially uesd in ware house,in fridge to give the cooling effect

3)use of hydrocarbon,we can use hcfc

4)because if they are once exintc they cannot be replaced by nature

5)because sun is a hot burning star it keep on emitting the rays