Answer:
There are many methods used by the scientists to study the change of earth's atmosphere and climate over the past million years. The study is called paleoclimatology. Since there are no measurement tools during those era, it studies the past by using proxy data. Proxy data includes earth's sediments, tree rings, historical archives, ice cores, and etc.
Explanation:
<span>A scientist measured an increase in nitrous oxide in the atmosphere. This increase would result in the greenhouse effect. </span>
No because sugar is transported into the cell by active transport.
