Extended Data Fig. 3: Takeoff years (1%) for onshore wind vs solar PV.
Each dot represents a country positioned according to its wind takeoff year on the horizontal axis and solar takeoff year on the vertical axis. The takeoff year is the year when the share of the given technology for the first time exceeds 1% of the total electricity supply. Countries where a particular technology has not taken off are placed in the grey bands on the top (no solar takeoff) and the right (no wind takeoff). The numbers in the top-right corner indicate the number of countries where neither wind nor solar takeoff has taken place. Colors indicate the country groups (Supplementary Table 5). See Supplementary Table 33 for country codes. The dashed line is based on a linear regression for the countries with both takeoff dates available (except for Denmark treated as an outlier with its very early wind takeoff). The regression coefficient is 0.33 (meaning that a country with wind takeoff three years earlier has, on average, solar takeoff one year earlier), R2 = 36%, p-value < 1%.
