#### Upfront cost of energy efficiency investments corresponding to $1.2 trillion in savings (billions of dollars)

* Rounded to the nearest ten billion

**Note: **The sum of the "Residential," "Commercial," "Industrial," and "Combined heat and power systems (CHP)" categories equals "Total upfront investment." The sum of "Total upfront investment" and "Range of program costs" equals "Total cost."

**Source:** Reproduced from McKinsey (2009)