Study shows six of nine key planetary health measurements exceed safe levels for humanity.
Factors include carbon dioxide levels, biodiversity, access to clean freshwater, pollution and the presence of human-made compounds.
Rising CO2 levels far exceed the safe threshold, exacerbating global warming.
The planet faces an alarming rate of biodiversity loss due to destructive human activities and climate change.
Freshwater systems are endangered due to pollution and over-use, resulting in water scarcity in many regions.
The study suggests restoring forests to absorb and store carbon dioxide as a significant measure against climate change.