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We invite all scientists to sign this global environmental article and engage with a new alliance concerned about global climate and environmental trends

World Scientists’ Warning to Humanity: A Second Notice


If you are a scientist from any scientific discipline (e.g. ecology, medicine, economics, etc.), we invite you to sign our Viewpoint article in the journal Bioscience entitled “World Scientists’ Warning to Humanity: a second notice” by Ripple et al. (2017). In doing so, you will be included in the full list of scientists who have signed this article and 15,000+ scientists from 184 countries who signed the article before the publication deadline on Oct. 23, 2017. Before signing, we ask that you view our 1,000-word article by clicking “Read the Article” tab below (the text can be read in 6 minutes). When you click “Sign the Article” and add your name, you will be indicating that you generally agree with our article, helping get this message to world leaders. To see an easy-to-read summary of the scientists’ warning project, click here.

Oregon State University has formally endorsed the Scientists’ Warning with a joint resolution (pdf) of the faculty senate and the student government.



(scientists only)

(signed before Oct. 23, 2017)

(signed after Oct 23, 2017)


The Alliance of World Scientists (AWS)

The AWS is a new international assembly of scientists, which is independent of both governmental and non-governmental organizations and corporations. We submit, that in order to prevent widespread misery caused by catastrophic damage to the biosphere, humanity must practice more environmentally sustainable alternative to business-as-usual. Our vital importance and role comes from scientists' unique responsibility as stewards of human knowledge and champions of evidence-based decision-making. The main goal of the AWS is to be a collective international voice of many scientists regarding global climate and environmental trends and how to turn accumulated knowledge into action. Other organizations do laudable work toward this goal, but to our knowledge, AWS is the only independent, grass-roots organization comprised of scientists from around the world committed to the well-being of humanity and the planet.

When you endorse the scientists’ warning article, you will have the option of including your email address for occasional communication or additional collaboration as part of the AWS.


Scientists Warning dot Org logo


Nonscientists are now invited to endorse the World Scientists' Warning to Humanity: a second notice at the companion website where both individual and organizational endorsements can be submitted and gratefully received.



Courtesy of Union of Concerned Scientists/Justin Bilicki

Sign this petition to help save global biodiversity www.change.org/mass-extinction

For information about donating to our project, please contact Bill Ripple


Global Human and Livestock/Methane Counters


The Ethics of Science
The end that science seeks is truth.
There are rules that must be followed in seeking the truth
which require trust, independence in observation and in thought.
Freedom, respect and tolerance are handmaidens to science.
Scientists acquire knowledge by small steps, none of which is final
and the mistakes of one generation of scientists are rungs in the ladder toward truth. The only purpose of seeking the truth is to accumulate knowledge which becomes the property of the world without respect to race, religion, nationality, political and sexual orientation or cultural beliefs. Science is unifying because it seeks answers which society ultimately hold as important.
-by William Stone, signatory of the second warning to humanity

Diversity and Inclusion

The Alliance of World Scientists is an inclusive group and all scientists are welcome to join when becoming signatories to the scientists’ warning article. Because we understand the complexity of identity and backgrounds of scientists throughout the world, we embrace the diversity of differences these scientists bring for solving environmental challenges. We now have 15,000 scientists from 175 countries as members of the Alliance of World Scientists.

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