There are many forms of energy around us: light, heat, vibrations, wind, electromagnetic fields, fluid flow, waves, organic waste, etc. At large scale, many of these energy sources already play a significant role in powering our society and are projected to become dominant contributors by 2040. On the smaller scale, exciting scientific and engineering challenges must be overcome to harness these energy sources. Success in developing devices that cost-effectively convert these very small magnitudes of energy into electricity will lead to massive infrastructural changes ranging from buildings to transportation to communication. In this talk, I will provide a brief summary on the progress made in developing these small scale devices and discuss the potential for hybrid systems that combine living and artificial components to capture environmental energy.