Respuesta :
The method when an ecologist sets up a greenhouse and measures the effects of different levels of carbon dioxide on an endangered plant species is called experimenting. I hope that this is the answer that you were looking for and it has helped you.
Answer:
Experimenting
Explanation:
If an ecologist sets up a greenhouse and measures the effects of different levels of carbon dioxide on endangered plant species, he is conducting an experiment. An experiment is a procedure that is meant to provide support, refute or validate a particular hypothesis. It is also meant to be repeatable and logical. Experimenting is an important step in the scientific method.