What can be Learned from the Atomic and Molecular Gas Scaling Relations of Nearby Galaxies?

I will present some highlights from GASS, the Galex Arecibo SDSS Survey, as well its sister survey COLD GASS. These surveys are characterizing the atomic and molecular hydrogen content of a sample of ~1000 nearby galaxies with stellar masses greater than 10^10 M_sol down to gas fraction limits of a few  percent. These surveys will allow us to understand the balance between atomic and molecular gas in nearby galaxies, and how these gas properties scale with other global galaxy properties such as stellar masses and star formation rates. By combining these observations with resolved spectroscopy, our aim is to learn  about the processes that regulate accretion from the external environment and ongoing star formation in the present-day galaxy population.