Rate of environmental degradation puts life on Earth at risk, say scientists

The view from the Amazon Tall Tower Observatory in the middle of the Amazon forest. Researchers say that of the nine processes needed to sustain life on Earth, four have exceeded “safe” levels. Photograph: Reuters The view from the Amazon Tall Tower Observatory in the middle of the Amazon forest. Researchers say that of the nine processes needed to sustain life on Earth, four have exceeded “safe”