Scientific Consensus on Maintaining Humanity’s Life Support Systems in the 21st Century: Information for Policy Makers

May 29, 2013 • Climate Change & Mitigation, Protection of Species, United States, Daily Email Recap

On Thursday, May 23rd, California Governor Jerry Brown appeared at NASA’s Ames Research Center to showcase a “call to action” signed by more than 500 scientists from 44 nations. Called the “Scientific Consensus on Maintaining Humanity’s Life Support Systems in the 21st Century: Information for Policy Makers“, the document addresses addresses five key problem areas: climate disruption; the extinction of species; transformation and loss of ecosystems; pollution; and population growth and consumption.

The declaration was largely the culmination of efforts by associates to the Millennium Alliance for Humanity and Biosphere (MAHB), which is an effort to help global civil society address the interconnections among the greatest threats to human well-being.



Scientists’ Consensus on

Maintaining Humanity’s Life Support Systems in the 21st Century.

Earth is rapidly approaching a tipping point. Human impacts are causing alarming levels of harm to our planet. As scientists who study the interaction of people with the rest of the biosphere using a wide range of approaches, we agree that the evidence that humans are damaging their ecological life-support systems is overwhelming.

We further agree that, based on the best scientific information available, human quality of life will suffer substantial degradation by the year 2050 if we continue on our current path.

Science unequivocally demonstrates the human impacts of key concern:

  • Climate disruption-more, faster climate change than since humans first became a species.
  • Extinctions-not since the dinosaurs went extinct have so many species and populations died out so fast, both on land and in the oceans.
  • Wholesale loss of diverse ecosystems-we have plowed, paved, or otherwise transformed more than 40% of Earth’s ice-free land, and no place on land or in the sea is free of our direct or indirect influences.
  • Pollution-environmental contaminants in the air, water and land are at record levels and increasing, seriously harming people and wildlife in unforeseen ways.
  • Human population growth and consumption patterns-seven billion people alive today will likely grow to 9.5 billion by 2050, and the pressures of heavy material consumption among the middle class and wealthy may well intensify.

By the time today’s children reach middle age, it is extremely likely that Earth’s life-support systems, critical for human prosperity and existence, will be irretrievably damaged by the magnitude, global extent, and combination of these human-caused environmental stressors, unless we take concrete, immediate actions to ensure a sustainable, high-quality future.

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