of comparable size, as well as emitting far less carbon dioxide gas and far fewer of the other gases that have

of comparable size, as well as emit far less carbon dioxide gas and far fewer of the other gases having

of comparable size, and also they emit far fewer carbon dioxide and other gases that have

that have a comparable size, and also they emit far less carbon dioxide gas and other gases that have

that have a comparable size, as well as emitting far fewer carbon dioxide and other gases having