In this March 28, 2018 file photo, a man holds his fishing rod, carrying an illuminated bobber, on the shore of Guanabara Bay where Petrobras operates its ultra-deep drilling vessel Laguna Star NS-44, in Niteroi, Brazil. Scientists say countries need to stop burning fossil fuels by 2050 at the latest to ensure global temperatures don't rise more than 1.5 degrees Celsius (2.7 Fahrenheit) this century. (Photo by Leo Correa/AP Photo/File)
