EPA (Environmental Protection Agency)

We spend 85% of our time indoors, and air conditioning can provide relief when and where we need it. Nevertheless, regulatory agencies continue to press for tighter outdoor emission controls. Their mantra is that lives can be shortened by long-term (years) exposure, no matter how trivial. This is the linear, no-threshold hypothesis currently promulgated by EPA.
The climate is changing while concerns about air pollution linger on.