Question

what is done with excess carbon dioxide after it is captured?
after it is captured, it is turned into a liquid then released back into the atmosphere.
while it is being captured, it is burned at a high temperature and separated into carbon and oxygen.
once captured, the co₂ is compressed and then transported to a safe and permanent storage location.
after it has been captured, the carbon dioxide is mixed with other chemicals then put in dumpsters.

Explanation:

To determine the correct answer, we analyze each option:

• The first option is incorrect because releasing captured CO₂ back into the atmosphere defeats the purpose of capture.
• The second option describes a process during capture, not after, and burning CO₂ at high temp to separate C and O is not standard for excess CO₂ post - capture.
• The third option is correct. Carbon capture and storage (CCS) typically involves compressing captured CO₂ and transporting it to a safe, permanent storage site (like underground geological formations).
• The fourth option is incorrect as dumping mixed CO₂ in dumpsters is not a valid or safe method for handling excess CO₂.

Answer:

The correct option is: Once captured, the $\ce{CO_2}$ is compressed and then transported to a safe and permanent storage location.