Share 'Secondhand Smoke Animations'

Reposted from i.e., the Center for Energy and Environment's Innovation Exchange blog -- http://mncee.org/Innovation-Exchange/ie/   Even though the walls of an apartment look solid, air buoyancy and pressure differences between interior spaces cause air to move between rooms and even to other units in the building. And as it travels within a building, air pollutants such as secondhand smoke (SHS)…