My cat peed on a mattress which effectively made it garbage. There are loads of mattresses by the dumpsters everywhere so they have to account for a good percentage of the landfill use and include refined steel in the springs and hardwood in the box springs. There needs to be good alternatives to this form of bedding (spring filled mattresses on box springs). By "good" I mean solutions people will buy due to comfort and convenience and ones that are competitively priced. Personally, I use foam mattresses on metal strips with springs or a hammock but those are not good enough for most people. Water beds have the heat-sucking problem (requiring water heaters).