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Claire James, Campaign against Climate Change, claire@campaigncc.org
Dr. Lucky Tran, March for Science, lucky@marchforscience.com
Over 2000 scientists from over 40 countries, and working on seven continents around the world, have signed letters pledging to join the Global Climate Strikes on September 20 and 27, 2019.
The letters support the youth movement's concerns as "well-founded" and based on "solid, incontrovertible evidence." The academics state that the "current level of action and ambition falls far short of what is needed to secure a safe future for this and all other generations."
Over 2000 scientists from over 40 countries, and working on seven continents around the world, have signed letters pledging to join the Global Climate Strikes on September 20 and 27, 2019.
The letters support the youth movement's concerns as "well-founded" and based on "solid, incontrovertible evidence." The academics state that the "current level of action and ambition falls far short of what is needed to secure a safe future for this and all other generations."
The scientists urge their colleagues around the world to cancel their classes, or move them outside and turn them into teach-ins for the whole community, and to leave their research labs to join youth leaders for marches and rallies.
The Global Climate Strike will take place in 137 countries, and over 5000 locations around the world, making it the largest mobilization for climate change in history. The strikes were inspired by Greta Thunberg in Sweden over a year ago, and have since grown into a global movement of millions. The September dates will be the first time adults will join the strikes, which are scheduled to take place during a week when world leaders gather in New York City to meet at the UN climate action summit.
Letters
Scientists' Letter in Support of the Global Climate Strike
Scientists and academics support the youth climate movement's call to strike
Quotes
Dr. Ploy Achakulwisut, Staff Scientist, Stockholm Environment Institute, Sweden:
"As a scientist, I've studied how climate-driven droughts will increase airborne dust pollution and how burning fossil fuels to power our cars are causing asthma in 4 million children a year worldwide. These are just two of the many reasons why I will be striking in solidarity with the brave young people who are rising up all around the world to demand bolder climate action, because I believe that we all have a right to clean air, clean water, and a livable climate."
Dr. Kim Cobb, Professor in the School of Earth and Atmospheric Sciences, Georgia Institute of Technology, USA:
"I'll be striking with my four children because the bold and urgent leadership of youth activists deserves the unbridled support of the climate science community. We have a historic opportunity to rise together in demanding climate action, and I'm honored and humbled to play a small supporting role on Friday."
Dr. Topiltzin Contreras, Profesor Centro de Investigaciones Biologicas, Universidad Autonoma del Estado de Morelos, Mexico:
"In the following decades climate change will exacerbate the freshwater biodiversity crisis we are already suffering, the time is now for science, industry and society to work together if we are to overcome this threat."
Professor Hayley Fowler, Professor of Climate Change Impacts, Newcastle University, UK:
"As a scientist I am deeply concerned about the rate of changes to extreme events we are experiencing, with more powerful and intense storm events, flooding, droughts, heatwaves, fires, sea level rise and the rapid melting of Arctic and mountain ice. Science tells us that 2 degrees or warming brings us to some dangerous tipping points or thresholds that will seriously affect human society. The scale of change is immense but not insurmountable. We need to act now to make easy and more difficult changes to our lifestyles to reduce emissions, with the lead from our Governments."
Dr. Ayana Elizabeth Johnson, Marine Biologist and Founder, Ocean Collectiv, USA:
"Because we understand the dire scientific predictions, and their implications for humanity and all species, we must raise our voices, strike, and insist governments and corporations transform their policies and practices to address the climate crisis."
Dr. Julia K. Steinberger, Professor of Social Ecology and Ecological Economics, University of Leeds, UK:
"The duty of all scientists and academics is to provide a better future for the youth of the world. Scientifically, we succeeded in explaining the causes and cures of the climate crisis. But at a more fundamental level, we failed to transform our societies and lower our emissions. The climate striking youth are calling us all out of our comfort zones, and it is now the duty of scientists and all adults to support them, in words and actions, to make the rapid and radical emissions reductions we need."
Dr. Oyewale Tomori, Professor of Virology, Redeemer's University, Ede Osun State, Nigeria:
"I am supporting the climate strike because climate change is likely to adversely impact several aspects of infectious diseases, including increasing the population of disease vectors, and changing the dynamics of human-animal-vector interactions."
Dr. Lucky Tran, Biologist and Managing Director, March for Science, USA:
"I am going on strike to stand with the people most impacted by the climate crisis--youth and frontline communities--who are calling on world leaders to stop stalling, and finally act with the urgency that science and justice demand."
In San Francisco, thousands of anti-Trump activists gathered on a local beach to form a human sign that read, "Trump must go now! No ICE, no wars, no lies, no kings."
Millions of American across all 50 states on Saturday rallied against President Donald Trump and his authoritarian agenda during nationwide No Kings protests.
The flagship No Kings rally in Minneapolis, which organizers Indivisible estimated drew over 200,000 demonstrators, featured speeches from Minnesota Gov. Tim Walz and US Sen. Bernie Sanders (I-Vt.), Rep. Ilhan Omar (D-Minn.), and actress Jane Fonda, as well as a special performance from rock icon Bruce Springsteen, who performed "Streets of Minneapolis," a song he wrote in tribute of slain protesters Renee Good and Alex Pretti.
The rally in Minneapolis was one of more than 3,300 No Kings events across the US, and aerial video footage showed massive crowds gathered for demonstrations in cities including Washington, DC, New York City, Boston, Philadelphia, Chicago, and San Diego.
Congratulations to all Americans who dared to take to the streets today and publicly expressed their stance and disagreement with the actions and policies of their president. #WeSayNoKings 👍👍👍 pic.twitter.com/f3UDpmsj3m
— Dominik Hasek (@hasek_dominik) March 28, 2026
In San Francisco, thousands of anti-Trump activists gathered on a local beach to form a human sign that read, "Trump must go now! No ICE, no wars, no lies, no kings."
WOW! Protesters in San Francisco, CA formed a MASSIVE human sign on Ocean Beach reading “Trump Must Go Now!” for No Kings Day (Video: Ryan Curry / S.F. Chronicle) pic.twitter.com/ItF7c7gvke
— Marco Foster (@MarcoFoster_) March 28, 2026
However, No Kings rallies weren't just held in major US cities. In a series of social media posts, Indivisible co-founder Leah Greenberg collected photos and videos of No Kings events in communities including Arvada, Colorado, Madison, New Jersey, and St. Augustine, Florida, as well as international No Kings events held in London and Madrid.
Attendance estimates for Saturday's No Kings protests were not available as of this writing. Polling analyst G. Elliott Morris estimated that the previous No Kings event, held in October, drew at least 5 million people nationwide, making it likely “the largest single-day political protest ever.”
"No work, no school, no shopping. We're going to show up and say we're putting workers over billionaires and kings."
Ezra Levin, co-founder of Indivisible, said on Saturday that a nationwide general strike is being planned for May 1 that will be modeled on the day of action residents of Minnesota organized in January against the brutality carried out by federal immigration enforcement officials.
Appearing at the flagship No Kings rally in Minneapolis, Levin praised the strength shown by the Minnesota protesters in the face of the US Immigration and Customs Enforcement (ICE) siege of their city this year, and said his organization wanted to replicate it across the country.
"The next major national action of this movement is not just going to be another protest," Levin said. "It is a tactical escalation... It is an economic show of force, inspired by Minnesota's own day of truth and action."
Levin then outlined what the event would entail.
"On May 1, on May Day, we are saying, 'No business as usual,'" he said. "No work, no school, no shopping. We're going to show up and say we're putting workers over billionaires and kings."
Levin: This is the largest protest in Minnesota history… The next major national action of this movement is not just gonna be another protest. On May 1st, across the country, we are saying no business as usual. No work, no school, no shopping. We're gonna show up and say we're… pic.twitter.com/bRPR7K5DuP
— Acyn (@Acyn) March 28, 2026
Levin added that "we are going to build on that courage, that sacrifice" that Minnesota residents showed during their day of action in January, and vowed "to demonstrate that regular people are the greatest threat to fascism in this country."
In an interview with Payday Report published Saturday, Indivisible co-founder Leah Greenberg said that the goal of the nationwide strike action would be to send "a clear message: we demand a government that invests in our communities, not one that enriches billionaires, fuels endless war, or deploys masked agents to intimidate our neighbors.”
The No Kings protests against President Donald Trump's authoritarian government, which Indivisible has been central in organizing, have brought millions of Americans into the streets.
Polling analyst G. Elliott Morris estimated that the previous No Kings event, held in October, drew at least 5 million people nationwide, making it likely "the largest single-day political protest ever."
"You thought it was bad when Iran throttled the Strait of Hormuz?... The Houthis have already proven they can keep the Red Sea closed despite a year of US Navy skirmishing," said one journalist.
The Houthis on Saturday took credit for launching a ballistic missile at Israel, opening a new front in the war US President Donald Trump illegally started with Iran nearly one month ago.
As reported by Axios, the attack by the Houthis signals that the Yemen-based militia is joining the conflict to aide Iran, which has been under aerial assault from the US and Israel for the past four weeks.
Although the Houthi missile was intercepted by Israeli defenses, it is likely just the opening salvo in an expanding conflict throughout the Middle East.
Axios noted that while the Houthis entered the war by launching an attack on Israel, they could inflict the most damage on the US and its allies in the region by shutting down the strait of Bab al-Mandeb in the Red Sea.
"Doing that," Axios explained, "would dramatically increase the global economic crisis that has been created due to the war with Iran" and its closure of the Strait of Hormuz, which has sent global energy prices skyrocketing.
Sky News international correspondent John Sparks reported on Saturday that the Houthis' entrance into the war shows that "this crisis is expanding, it is escalating."
'This crisis is expanding and escalating.'
Houthi rebels in Yemen have confirmed they launched a missile at Israel, marking the Iran-backed group's first involvement in the war.
@sparkomat reports live from Jerusalem
https://t.co/Leuc4SnGfG
📺 Sky 501 and YouTube pic.twitter.com/TmlyFHkCZN
— Sky News (@SkyNews) March 28, 2026
Sparks argued that the Houthis' decision to fire a missile at Israel signals that "the geographical spread of this conflict is expanding," adding that "the Houthis have shown the ability to attack shipping in the Red Sea and the waters around the Arabian Peninsula."
Sparks said that even though Trump and Secretary of State Marco Rubio "have been projecting confidence" about having the war under control, "it's not playing out that way... on the ground."
Danny Citrinowicz, senior researcher at the Institute for National Security Studies, argued that the Houthis' main value to Iran isn't launching strikes on Israel, but their ability to increase economic pressure on the US.
Citrinowicz also outlined ways the Houthis could further drive up the global price of energy.
"This raises a key question: whether the Houthis will escalate further by targeting Saudi infrastructure and shipping lanes more directly, or whether they will preserve this capability as an additional lever of pressure as the conflict evolves," he wrote. "With each passing day of the conflict, particularly in light of its expanding scope against Iran, the likelihood of this scenario materializing continues to grow. It is increasingly not a question of if, but when."
Journalist Spencer Ackerman similarly pointed to the Houthis' ability to cause economic havoc as the biggest concern about their entrance into the conflict.
"You thought it was bad when Iran throttled the Strait of Hormuz?" he asked rhetorically. "The Houthis have already proven they can keep the Red Sea closed despite a year of US Navy skirmishing."