BBC: Emissions of nitrous oxide (N2O) from agriculture in some locations are underestimated by 40% according to new research.
The gas is a significant threat as it contributes both to global warming and the destruction of the ozone layer.
Intensive farming and the use of fertilisers are the biggest human sources of the substance.
This new study adds to a body of evidence that N2O is a far bigger problem than previously thought.
Nitrous oxide was once used as a dental anaesthetic but there...