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YES!
man-made structures were made by humans, but natural structures made itself.
mostly only humans are responsible for thw water scarcity
mitochondria
Lymph Nodes
haemoglobin present in the RBC helps in gaseous exchange and transport in humans .. where as in plants its through stomata , cuticle , lenticels etc....
Lungs
yes humans are responsible
yes Ozone has been shown to exacerbate asthma symptoms. It also does the same sort of damage to the breathing structures of all organisms that exchange gases to / from the atmosphere.
YES!
for heating and cooking, gaseous fuel, and to create electricity
humans are responsible
The skin surface is not large enough for big creatures such as humans; therefore we have structures in our lungs that greatly increase the surface area.
man-made structures were made by humans, but natural structures made itself.
The exchange takes place within the lungs.
humans
Tailbones, tonsils, appendix,