Fig. 2: Global distribution of RPV electricity generation and carbon mitigation potential.
From: Worldwide rooftop photovoltaic electricity generation may mitigate global warming

a,b, Electricity generation (a) and carbon emission reduction (b). Intensity and volume combinations are divided by quartiles, with the percentages of countries in each combination summarized. While the volume index refers to the benefits provided by all potential RPV installations, the intensity index indicates the benefits provided per unit of potential RPV installation.