This June was the hottest in American history. The 116-degree heat melted power cables in Portland, Oregon, and smashed previous temperature records. Seattle recorded an all-time high of 108 degrees, as did the Canadian province of British Columbia, at a whopping 121 degrees.

As the world warms, more people are installing air conditioning. Global energy demand for cooling has more than tripled since 1990 and could more than double between now and 2040 without stricter efficiency standards.