  Three molecular clouds have been mapped in the nearby metal-poor dwarf
irregular galaxy NGC 6822 using the Owens Valley Millimeter-Wave
Interferometer. Based on upper limits to the virial masses of the clouds, the
CO-to-H2 conversion factor in NGC 6822 is <2.2+/-1.3 times larger than the
Galactic value. Conversion factors obtained for Galactic molecular clouds,
  NGC 6822, and the SMC are consistent with the variation in the CO-to-H2
conversion factor being linearly proportional to the oxygen abundance of the
galaxy. However, the uncertainties are sufficiently large that equal conversion
factors in NGC 6822 and the Galaxy cannot be ruled out. The gas depletion time
obtained for the HII region Hubble V is comparable to those of giant HII
regions in M33. Thus high-efficiency star formation is not limited to the giant
HII regions seen spiral galaxies, but can also occur in a small group of
relatively low-mass molecular clouds.
