Track Mashup Submit Mashup Mashup: Planet Hazard Comments Science, Environment, Mapping Learn about the unknown hazards around you - the toxins you may be breathing. PlanetHazard maps over 86,000 companies throughout the US that emit hazardous air pollutants. Excellent mashup. Summary Comments Followers Summary Comments Followers Comments (1) Comments(1) Comment * Leave this field blank Post Comment G Johnson (not verified) 8:22 PM Mar. 26 2008 reply This is completely awesome and user friendly. Thank you! I will add this to my site.