" It developed in the 1970s, first as a ravine.... Vast wildfires, which have become more intense in recent seasons, exacerbate the problem. Locals in Sakha have taken note of the crater's rapid growth."( Two years ago the edge) was about 20-30 metres away from this path.... " This will lead to more and more climate warming in the following years."( Reporting by Reuters; Writing by Lucy Papachristou; Editing by Andrew Osborn and David Holmes)....