<Tr> <Td> Carbon dioxide (CO) </Td> <Td> 280 ppm </Td> <Td> 395.4 ppm </Td> <Td> 115.4 ppm </Td> <Td> 41.2% </Td> <Td> 1.88 </Td> </Tr> <Tr> <Td> Methane (CH) </Td> <Td> 700 ppb </Td> <Td> 1893 ppb / 1762 ppb </Td> <Td> 1193 ppb / 1062 ppb </Td> <Td> 170.4% / 151.7% </Td> <Td> 0.49 </Td> </Tr> <Tr> <Td> Nitrous oxide (N O) </Td> <Td> 270 ppb </Td> <Td> 326 ppb / 324 ppb </Td> <Td> 56 ppb / 54 ppb </Td> <Td> 20.7% / 20.0% </Td> <Td> 0.17 </Td> </Tr> <Tr> <Td> Tropospheric ozone (O) </Td> <Td> 237 ppb </Td> <Td> 337 ppb </Td> <Td> 100 ppb </Td> <Td> 42% </Td> <Td> 0.4 </Td> </Tr>

Identify the non green-house gas(ghg) from the following