According to a recent study of the planet's life support systems, researchers at the Potsdam Institute for Climate Impact Research (PIK) say industrial civilization is on the verge of or has already crossed the seventh of nine "planetary boundaries."
The researchers say there has been a breach of the boundaries for climate change, biosphere integrity, land system change, freshwater change, biogeochemical flows, and the introduction of novel entities like synthetic chemicals or plastics.
The release of the first Planetary Health Check Report represents a significant step forward in our understanding and preservation of Earth's stability and resilience. Staying within the safe operating zone of the nine planetary boundaries is critical to establishing a stable and sustainable world. Surpassing a boundary heightens the risk of irreversibly altering Earth's life support systems and crossing critical points. This is a call to action to mobilize political support to help restore already breached boundaries.
The notion of planetary boundaries is flawed and may mislead global environmental management initiatives. Six of the nine proposed boundaries don't actually have clear global biophysical limits — land use change, nitrogen levels, species loss, freshwater use, chemical pollution, and aerosol loading. In other words, there are no apparent global tipping points for these boundaries that would cause natural systems to behave differently than they have historically.