On October 5, 2018, energy efficiency advocates from around the country came together with corporations, state and local governments, non-profits, and other groups to celebrate the third annual Energy Efficiency Day.

A timer is ticking, and just when you think you know how much time is left until the buzzer rings, you are presented with a new target. An Intergovernmental Panel on Climate Change (IPCC) special report finds that limiting global warming to 1.5°C requires “rapid and far-reaching” transitions in land, energy, industry, buildings, transport, and cities. Global carbon dioxide (CO₂) emissions need to fall by 45 percent from 2010 levels by 2030, reaching net zero by 2050.