<human>:  What recent technological advances have been made in renewable energy?
<bot>: Recent technological advances in renewable energy include advances in solar energy, wind energy, and energy storage. Solar energy has been improved through the use of higher efficiency panels, thinner-film technology, and advances in tracking systems. Wind energy has been made more efficient through the use of larger and higher-efficiency turbines, taller towers, and improved software algorithms. Energy storage technology has also advanced in recent years, with the development of more cost-effective batteries and other storage devices.