Since the Industrial Revolution, human activities have dramatically increased atmospheric CO2 levels, leading to global climate change. Stiling and Drake investigated other effects that elevated CO2 may have on ecosystems. What did they conclude

the way that the mass of carbon can be conserved through cellular respiration is through a process/law called the law of conservation of mass which even tho it undergoes a process, mass is not be destroyed or changed

"a.) well–developed vascular system."

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answer: collecting information/data

reason: the student is going around and asking people questions to collect data

i hope this