The Earth League, supported by the Global Challenges Foundation, released on Earth Day the first ‘Earth Statement’ ahead of 2015 climate negotiations. It calls for bold action by decision-makers to reduce the risk of dangerous climate change Photo: M Kegl/Azote

Climate change

Launch of the Earth Statement

On Earth Day, scientists publish essential elements for 2-degree celsius global climate agreement

Bold action by decision-makers is required now to pave the way for a successful international agreement to reduce the risk of dangerous climate change, said leading scientists at the launch of the Earth League’s 'Earth Statement'. The launch coincided with Earth Day 22 April 2015.

Written by 17 world-leading scientists, the Earth Statement clarifies, in eight essential elements, what the international climate agreement in Paris in December should achieve in order to provide the world with a good chance of avoiding dangerous climate change. The first essential element is a commitment to limit global warming to below 2° Celsius, requiring a transition to a zero-carbon society by mid-century.

Show leadership and commitment
"The window of opportunity is closing fast. We are on a trajectory that will leave our world irrevocably changed, far exceeding the 2° Celsius mark. This gamble risks disaster for humanity with unmanageable sea-level rise, heat waves, droughts and floods. We would never consider this level of risk in any other walk of life, yet we seem prepared to take this risk with our planet. Conversely, the scientific evidence shows that we can create a positive future but only with bold action now,” said Centre director Johan Rockström. He is Chair of the Earth League and board member of the Global Challenges Foundation which supports the Earth League.

"The science, the economics and the moral imperative to protect our planet all demand this action. We are calling on policy-makers to show real leadership and commit the planet to a sustainable future,” continued Rockström.

The Earth Statement, released to coincide with Earth Day, warns of the risk of crossing tipping points – thresholds in the Earth system that are difficult to reverse once crossed. It highlights recent research suggesting dramatic ice melt in parts of Antarctica may be irreversible, which provides evidence that societies need to take a precautionary approach to significantly altering the global climate.

"COP21 is the moment of truth: the last chance to stay within the 2° Celsius upper limit," said Professor Jeffrey Sachs, Director of the Earth Institute at Columbia University and an author of the Earth Statement.

"The key to success is deep decarbonisation by mid-century. Our studies show that this can be accomplished, at modest cost, and with a significant improvement in the quality of life. Success will require a shared global vision, strong national commitments, and global cooperation on technology pathways."

Eight elements
The eight essential elements of climate action are:
1. Governments must put into practice their commitment to limit global warming to below 2° Celsius in order to limit unprecedented climate impact risks

2. The agreement must be based on the remaining global carbon budget – the limit of what we can still emit in the future – which must be well below 1000 Gt CO2, to have a reasonable chance to hold the 2° Celsius line

3. In the agreement, countries must commit to deep decarbonization, starting immediately and leading to a zero-carbon society by 2050 or shortly thereafter. This will require a fundamental transformation of the economy

4. Equity is critical. Every country must formulate an emissions pathway consistent with deep decarbonisation. For the sake of fairness, rich countries and progressive industries can and should take the lead and decarbonise well before mid-century

5. Targeted research, development, demonstration and diffusion (RDD&D) of low-carbon energy systems and sustainable land use are prerequisites to unleash a wave of climate innovation

6. The agreement should provide the starting point for a global strategy to reduce vulnerability, build resilience and deal with loss and damage of communities from climate impacts, including collective action and scaled-up support

7. Countries must agree to safeguard carbon sinks and vital ecosystems, such as forests, which is as important for climate protection as the reduction of emissions

8. Governments must urgently realise new scales and sources of climate finance for developing countries to enable our rapid transition to zero-carbon, climate-resilient societies

To view the full Earth Statement and learn how to support the cause, please visit

For more information about the Earth Statement, please contact:
Kate Lowry, Edelman
Phone: +44 0 20 3047 2471


For more information regarding the Earth Statement, please contact:

Kate Lowry, Edelman
Phone: +44 0 20 3047 2471

About the Earth League
The Earth League is an international alliance of prominent scientists from world‐class research institutions, who work together to respond to some of the most pressing issues faced by humankind, as a consequence of climate change, depletion of natural resources, land degradation and water scarcity.

Authors of the Earth Statement Johan Rockström, Stockholm Resilience Center, Sweden; Guy P. Brasseur, Max Planck Institute for Meteorology, Germany; Ottmar Edenhofer, Mercator Research Institute on Global Commons and Climate Change, Germany; Sir Brian Hoskins, Grantham Institute - Climate Change and the Environment at Imperial College London, UK; Pavel Kabat, International Institute for Applied Systems Analysis, Austria; Mario J. Molina, Centro Mario Molina, Mexico; Jennifer Morgan, World Resources Institute, USA; Nebojsa Nakicenovic, International Institute for Applied Systems Analysis and Vienna University of Technology, Austria; Carlos Nobre, National Institute for Space Research (INPE), Brazil; Veerabhadran Ramanathan, Scripps Institution of Oceanography, San Diego (UC), USA; Hans Joachim Schellnhuber, Potsdam Institute for Climate Impact Research, Germany; Peter Schlosser, Earth Institute, Columbia University, USA; Youba Sokona, The South Center, Switzerland; Leena Srivastava, TERI University, India; Lord Nicholas Stern, Grantham Research Institute on Climate Change and the Environment, London School of Economics and Political Science, UK; Guanhua Xu, Chinese Academy of Sciences, China; Additional author (not EL member): Jeffrey Sachs, The Earth Institute, Columbia University


Stockholm Resilience Centre is a collaboration between Stockholm University and the Beijer Institute of Ecological Economics at the Royal Swedish Academy of Sciences

Stockholm Resilience Centre
Stockholm University, Kräftriket 2B
Phone: +46 8 674 70 70

Organisation number: 202100-3062
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