I heard only shale gas but good to know about oil. As far as I know, USA is not one of the main oil exporters, mostly middle east countries, especially of Arab peninsula. Venezuela, Iran, too but they are under sanctions. American oil / gas, please, correct me if I am wrong serves mostly as strategic reserves so it may be that USA that it’s better for Texas to use solar energy. However, most of calculations don’t track the whole lifecycle of solar panels and their environment conditions - I mean whole energy produced for the solar panels lifespan (15 - 25 years) minus the costs of production and utilization. The analysis needs to be done per each case not mandated for all because it doesn’t make sense with the total costs adjusted like in Poland. I know many owners of solar panels in Poland and it’s not that ‘rosy’ with the solar energy savings