That is unfair. The largest co2 producers are also large in size. I think 1km resolution is more than sufficient to identify the source of the majority of emiss

That is unfair. The largest co2 producers are also large in size. I think 1km resolution is more than sufficient to identify the source of the majority of emissions - e.g. factories, power plants, buildings, etc. Even if the resolution is not fine-grained enough for definitive identification it reduces the scope to manageable size for more detailed investigations.