The image shows multiple aerial photos over time of a lake where half was covered with reflective powder to slow spring melting.
A group called the Bright Ice Initiative proposes to slow melting of snow on the ground at the end of winter and glaciers by covering them with a reflective white powder. The powder is made of tiny hollow glass micro-spheres which, because they very small, are highly solar reflective. When the ice or snow melts and the microspheres land on water, they float, continuing to provide reflectivity. Snow is highly reflective and causing it to last longer into summer leverages reflectivity of the micro-spheres. Reducing melting of glaciers reduces sea level rise.