| 1 | But while on the farm it's nitrogen oxide and methane. | |
| 2 | It also generates much less smog-forming nitrogen oxide. | |
| 3 | The whole system is stuffed with energy and nitrous oxide emissions. | |
| 4 | "Nitrogen oxides in particular are of concern, " he says, because they can destroy ozone. | |
| 5 | Enterprises shall gradually adopt measures to control the nitrogen oxide generated by the burning of fuel. |