For the first time in over 19 years, ASHRAE has increased the minimum required prescriptive R-value (resistance to heat flow) for roof and wall insulation levels in Standard 90.1 – the national model energy code for commercial buildings.

The warming of Earth's surface and oceans over the past century is very well documented, and climate research shows that most of the warming in the past half century results from manmade greenhouse gases.

Human-induced climate warming is already having a dramatic effect on Earth's plumbing, plants, and animals, according to an exhaustive analysis of data from around the world.