Answer: A. Air bubbles trapped in a layer indicate how much CO2 was in the atmosphere the year the layer formed.
Explanation:
When ice cores were formed, they included air bubbles that got stuck during the formation. Scientists can study these air bubbles to find out how much carbon dioxide is in them as this will show the proportion of carbon dioxide in air at the time the core was formed.
They can then compare those figures to current carbon dioxide levels to see if there has been a change. This change will give proof of climate change.
Answer:
Keep a good infrastructure, low poverty rate, low infant mortality, and not let families have too many kids.
Explanation:
A..I belive...<span> Great Britain, for example, decentralizes power in practice though not in </span>constitutional<span> principle?</span>
Continental polar (cP) or continental arctic (cA) air masses<span> are cold, dry, and stable</span>
A brush to clean your teeth