Respuesta :
Answer:
O hydrogen
Explanation:
hope it helps, please mark as brainliest please
Answer:
ozone
Explanation:
Out of the 1% of trace gases it makes up .01% of them.
Answer:
O hydrogen
Explanation:
hope it helps, please mark as brainliest please
Answer:
ozone
Explanation:
Out of the 1% of trace gases it makes up .01% of them.