3 ms·

Apologies for my pet peeve, but it's CO, not CO2....

• lancewiggs 8y ago
  Not necessarily - CO2 detectors are readily available. It's interesting to see how tired you get as CO2 rises.
  • JshWright 8y ago
    That's not the sort of thing you care about learning in a "timely manner" if you're "not at the location".