Major studies researching ways to reduce carbon footprints from sources that add such gases
as carbon dioxide and methane to the atmosphere have recommended not only that home appliances should be used judiciously but also reduction of emissions from automobiles.
A. as carbon dioxide and methane to the atmosphere have recommended not only that home appliances should be used judiciously but also reduction of
B. as carbon dioxide and methane to the atmosphere have recommended not only using home appliances judiciously but also reducing
C. as carbon dioxide and methane to the atmosphere have not only recommended using home appliances judiciously but also reduction of
D. like carbon dioxide and methane to the atmosphere have recommended not only using home appliances judiciously but also reducing
E. like carbon dioxide and methane to the atmosphere have not only recommended using of home appliances judiciously but also reduced