Neither. Looking e.g. here their energy consumption and thus also need to generate is increasing in general. So they are building both at the same time.
CO2 emissions from energy use and cement production fell by 1% in the second quarter. When combined with a sharp 6.5% increase in January-February and a monthly decline in March, there was a 1.3% rise in CO2 emissions across the first half of the year, compared with the same period in 2023.