It should lead to the development of science-based advice on how measures to reduce climate change in housing and construction can avoid risks to health, and produce health improvements.

If it lasts, easier access to cheaper finance ought to help boost housing demand, particularly since the plunge in house prices has improved many measures of housing affordability.

Unlike other measures of the housing market, Zillow's Numbers are not based on actual sales, but on estimates of what its model thinks your house, along with every other house in America is worth.