Carbon dioxide, which comes from burning fossil fuels, is a leading greenhouse gas that many scientists say is causing a warming of the earth is concentrations build in the atmosphere.
(Carbon dioxide; comes; from burning fossil fuels) (Carbon dioxide; is; a leading greenhouse gas that many scientists say is causing a warming of the earth is concentrations build in the atmosphere) (many scientists; say; is concentrations build in the atmosphere)
Carbon dioxide Carbon dioxide many scientists
comes is say
from burning fossil fuels
a leading greenhouse gas that many scientists say is causing a warming of the earth is concentrations build in the atmosphere
is concentrations build in the atmosphere