Over the past decade, cellular technology has grown exponentially. This growth has led to a massive increase in cellular infrastructure, as well as a massive increase in power consumption to operate. The increase in power usage is expensive, both financially and environmentally. In 5G, wireless systems have grown more complex and it is difficult to know where energy goes and there are no methods for measuring energy usage built into the standard. 6G is the first generation of wireless technology that is focused on sustainability from the beginning. 6G looks to reduce the overall resource consumption of wireless systems and to enable other industries to be more sustainable. But to reduce resource consumption, it first must be measured. The start of a new generation gives engineers a chance to add power consumption measurements and others to the standards. Having a detailed knowledge of how energy is being used in wireless systems is key to building a greener, more sustainable 6G. This keynote will walk through the economic and technology forces driving the push for higher energy efficiency in 6G, the current work being done in the industry and standards, and the engineering challenges that must be addressed to make 6G the first green G.