<Tr> <Td> Carbon tetrachloride (CCl) </Td> <Td> </Td> <Td> 0.82 </Td> </Tr> <Tr> <Td> Nitrous oxide (N O) </Td> <Td> </Td> <Td> 0.017 </Td> </Tr> <Tr> <Td> Alkanes (Propane, Isobutane, etc) </Td> <Td> </Td> <Td> 0 </Td> </Tr> <Tr> <Td> Ammonia (NH) </Td> <Td> R - 717 </Td> <Td> 0 </Td> </Tr>

Why do odp and gwp have no units