When an electricity user chooses to generate its own electricity with an o-site alternative such as PV solar or wind turbines, they make it possible for the utilities to concentrate elsewhere and sell their electricity to their remaining customers. Their need to invest billions in nuclear plants, or to modernize coal fired plants is greatly diminished.
This example is a plant in Maryland not far out of the NE quadrant of Washington, DC. They covered their employee parking area with PV panels. The primary benefit is electricity. The secondary benefits are the cars no longer bake in the summer sun and the parking area in not covered in deep snow in the winter.
This is not the only installation of this type in the area. Only a mile or so away is this other recent installation of PV panels over the parking lots.
These installations can also be added to the roofs of the buildings, but a bit more Engineering might be necessary due to increased roof loading. There are huge facilities all over the nation that can be fitted with PV panels thereby benefiting both the company and the environment.
Legislation gets the ball rolling in many such changeovers, but the sustaining principles are what will make and keep our energy usage sustainable.
Parking lots and building roofs are not the only land areas that can be "solarized." Aqueducts and long drainage channels can be covered. Aqueducts benefit from lower evaporation of the water while it is flowing to the locations where it will be used. Floating PV installations can cover parts of reservoirs. There are many more such locations.
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