Environmental Science
The gas that shows the most variation from place to place and from time to time in the lower atmosphere:

Argon (Ar)
Methane (CH4)
Carbon dioxide (CO2)
Water vapour (H2O)
Ozone (O3)

ANSWER DOWNLOAD EXAMIANS APP

Environmental Science
What is the cause of the Exxon Valdez?

none of these.
Oil Tanker which sank in 1989 along the coast of Alaska and marine life seriously affected.
a ship which wrecked on the coast of India
a plane which crashed and caused death of human life

ANSWER DOWNLOAD EXAMIANS APP