Warning: Missing argument 3 for write(), called in /www/wwwroot/biwei1.cn/incs/robot.php on line 68 and defined in /www/wwwroot/biwei1.cn/incs/data.php on line 487 Yup, useful energy output is the foundation of the economy just like sunlight is the foundation of the ecosystem.To first approximation, any given country’s good & services production will be proportionate to their energy output.