Carbon can be found in shells and sedimentary rock at the bottom of
oceans in the form of...
A. carbonic acid.
B. calcium carbonate.
C. carbon dioxide.

answer: although many types of viruses can cause a common cold, rhinoviruses are the most common culprit. a cold virus enters your body through your mouth, eyes or nose. the virus can spread through droplets in the air when someone who is sick coughs, sneezes or talks. theres your answer

explanation:

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint