Renowned Canadian photographer Edward Burtynsky has spent a lifetime documenting mankind’s impact on the planet, picturing German coal mines, vast industrial landscapes in China and more recently, salt pans, gold tailings, oil bunkering and more in sub-Saharan Africa. His current exhibition of photos shot in Kenya, Nigeria, South Africa and beyond at Chelsea’s Sundaram Tagore Gallery includes otherworldly landscapes created by the harvesting of salt, including these Salt Ponds near Naglou Sam Sam in Senegal. In shallow, man-made ponds, microorganisms change color as evaporation causes salinity to increase, resulting in a spectacular, painterly display. (On view in Chelsea through April 1st).