Total equivalent warming impact (TEWI) is besides global warming potential measure used to express contributions to global warming.
It is defined as sum of the direct emissions (chemical) and indirect emissions (energy use) of greenhouse gases.

References
Sources
Reiss M. (March 1996). "Total equivalent warming impact of refrigerants". Fuel and Energy Abstracts. 37 (2): 147–147(1). doi:10.1016/0140-6701(96)88188-4.