Will solar become the primary source of electricity in the US before 2040?
Basic
36
2.1k
2040
68%
chance

"Primary" means that it generates more than any other method of a similar degree of generality over the course of a year. It doesn't have to be over 50%.

Includes both panels and power towers.

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Should clarify how long a time period solar must exceed all other sources. Data is probably available on a minute by minute basis, or should it be an hour, a day or a year?

Good point. Year.