Which of the following gases is not found in earth’s atmosphere?
a. oxygen
c. hydrogen
b. nitrogen
d. all of the above are in the atmosphere

as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.

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: