I created a class to teach zero waste. It turned into so much more

(Credit: Unsplash)

This article is brought to you thanks to the collaboration of The European Sting with the World Economic Forum.

Author: Sage Lenier, Student, UC Berkeley


  • This activist created and teaches a course at UC Berkeley about how to achieve zero waste.
  • In an interview with the Forum, she discusses the course and its aims – and her hopes and ambitions for the future.

Sage Lenier, an environmental activist and graduate from UC Berkeley, created a wildly popular course at her university dedicated to sustainable solutions and circular systems thinking against the broader backdrop of environmental justice. In Spring 2020, the course enrolled more than 300 students eager to learn how they can drive the shift towards a more ethical and sustainable society. The World Economic Forum sat down with Sage for a quick Q&A.

What drove you to start teaching zero waste?

When I started at UC Berkeley, I was excited to be going to a school that had – I’m told – one of the best environmental curriculums in the nation. But I quickly realized that much of the education I was receiving had little real-life application; the material lacked the call-to-action that is really necessary for addressing the ecological crisis.

That’s why I decided to create a course that was solutions-focused and action-based. I started out with the concept of zero waste, but I scaled it up from individual-level action to build a vision for an economy, design system and culture that operate on the premise that natural resources are valuable and limited. I also cover modern food systems, climate change and decarbonization, and green cities, always looking at a global picture of access, equity, and cultural and ecological diversity.

The approach I take helps students learn how all of these things come together for a vision of a sustainable future. I want them to be excited about the year 2100, rather than terrified.

What are the biggest misconceptions about your course?

Sometimes my course gets misconstrued as a place where I teach students about what they can do to lessen their individual environmental impact. It’s not really that at all. I do try to walk my students through the changes that they can make in their own lives, but the course is really about a societal revolution. It’s focused on structural change, political advocacy, and community power.

Two-thirds of my students are not environmental majors, and I try to give everyone something that they can do with their lives and their careers. A business major, after taking the class, might tell me: “I want to spend my career in businesses that fit with the circular economy.” Or a biochemistry major might say: “I could operate a green lab.” I’m focused on big-picture solutions, all of us coming together to accomplish something through so many different avenues with our different skill sets, as well as how we can make our community a little bit better.

When we talk about climate change, sustainability and equity, are we really talking about the same thing?

Absolutely, and I think most people are shocked when they start taking my course to learn that I’m not really here to advocate on behalf of trees. Climate change is a social justice issue; it is already exacerbating existing inequalities and will continue to do so.

I’m first and foremost a human rights activist. I’ve been passionate about feminism and racial justice from a very young age and have always done my best to educate and engage those around me. I came to environmentalism a few years ago with the realization that there are no human rights on a dead planet – this one movement really has the potential to encapsulate every social issue we have.

What do you think needs to happen to enable us to move to a circular economy more quickly?

If we really want to move towards a circular economy, we have to do a lot of direct targeting of the big corporations who already have the infrastructure, financial power and influence in our society. In our activism work, we need to be demanding that these massive companies that actually run our society and have control over our economy and government are accountable to the people.

Image: Irene Yi

College students were heavily impacted by COVID-19 this year. What was that experience like for you, as a student, instructor and activist?

I’ll be honest, I lost a lot this year. I had to give up my dreams of expanding this course to other schools and communities for now, and all of my activism campaigns completely dissolved. After I graduated, I slept on the couch at my grandmother’s house for two months. I was very lucky to receive a job offer in July for an environmental nonprofit and be financially stable for the second half of this year, but I’ve had to fight very hard to get my mental and physical health back from where they went when I thought I was losing everything I’d ever worked for. This year has been transformative in some good ways too, though; I needed to take a step back before I burned out, and I deactivated my social media for six months after a few super viral posts because I wanted to ask myself why I feel qualified to educate people and check my intentions. I’m young, and it’s easy to develop an ego and forget what you’re really working towards when you start getting media attention.

What’s next for you?

Right now I’m just feeling very grateful to be employed and still doing important work. Zero Waste USA recently reached out to me about sponsoring my course on their online platform, so I’m very excited to be back to teaching in the new year, and the class is going to be open to everyone! I want to keep going with this curriculum and eventually turn it into a book because I think what I’ve created is really unique, and it’s a lot of the information that the average person really needs. For now, I’m getting back into the swing of things with teaching online and making educational content for Instagram. My teaching assistants, Annie Mitchell and Victoria Bartoszewicz, are still teaching it at Berkeley and after the pandemic I still do want to take it to other colleges, high schools, communities – anywhere that wants it.

When that eventually comes around, I’ll be applying for grants and trying to get the book published. The idea of trying to get funding and hoping I get it and hoping it keeps coming is really scary, but I’m also excited because this is the most important thing that I can do – to continue to educate people and create a better equipped and larger environmental movement. It’s a huge risk, but this is all I’ve ever wanted.


Discover more from The European Sting - Critical News & Insights on European Politics, Economy, Foreign Affairs, Business & Technology - europeansting.com

Subscribe to get the latest posts sent to your email.

Interesting reads

This article is published in association with United Nations.

‘Connect the dots’ between street protests and global turmoil, urges Guterres

This article is published in association with United Nations. The international community must combat inequality and stop wars from expanding to ensure a safer world for all, the UN Secretary-General said on Thursday. Speaking to reporters in New York ahead of a visit to Egypt, António Guterres addressed growing public discontent in Europe and beyond, […]
© SOS Méditerranée/Anthony Jean Up to $500 million was paid in migrant smuggling fees on sea routes to Europe in 2025, according to new UN estimates.

Migrants paid up to $500 million in smuggling fees on European sea routes

This article is published in association with United Nations. The price tag for smuggling on European sea routes reached up to half a billion dollars last year, the UN Office on Drugs and Crime (UNODC) and the UN migration office, IOM, reported on Wednesday. Key points Almost half of migrants trying to get smuggled into […]
The author of this article explored other courses in different fields, but it was in medicine that she found her place. From the beginning of her studies, Valéria discovered in medical practice more than just a career: she found her vocation when she realized that caring for others also gave meaning to her own life. Driven by a genuine desire to help, the student stood out as a Teaching Assistant in Public Health, strengthening her humanized perspective. Today, she is part of the coordinating board of IFMSA UNEX MED, working in the Human Rights and Peace (SCORP) area, where she transforms empathy into action and social commitment into real impact.

Global warming will breach 1.5°C – but deep, fast cuts can still bring it back

This article is published in association with United Nations. With global temperature rise set to exceed 1.5°C above pre-industrial levels, countries “must pull out all the stops” and urgently cut emissions to minimize the overshoot and return to the internationally agreed threshold by the end of this century. The recommendation comes in the Emissions Gap […]
© Agricultural Development Association – PARC A farmer in the West Bank harvest olives in October 2025. (file)

‘Season of fear’: Escalating Israeli attacks on West Bank olive farmers, deadly strikes on Gaza

This article is published in association with United Nations. Israeli attacks on war-torn Gaza over the weekend killed at least six Palestinians, including children, despite a year-old ceasefire agreement. Meanwhile, in the occupied West Bank, settler violence continued through the ongoing olive harvest, with UN independent experts on Monday urging Israel to protect Palestinian farmers. […]
This article is published in association with United Nations.

COP17: The world has a plan to save nature. Is it working?

This article is published in association with United Nations. The UN Secretary-General has called for an end to the “war on nature”. On Monday, governments gathering in Yerevan, Armenia, will have to confront a more practical question: are they doing enough to win the peace and put the world’s biodiversity goals back on track? COP17, […]
© WHO A large-scale combined missile and drone strike hit Kyiv's Solomianskyi district on August 20, 2026.

Ukraine: Critical health supplies destroyed in ongoing Russian attacks

This article is published in association with United Nations. Ongoing and deadly Russian attacks across Ukraine are causing serious healthcare disruption, with more than $1.5 million-worth of medicines and supplies destroyed in four separate strikes on warehouses used by the UN there since July. According to the World Health Organization (WHO), 21 warehouses have been […]
© UNICEF/Niccolò Corti A child sits alone, praying, at a reception centre for migrants in Lampedusa, Italy.

World News in Brief: West African migrant crossings, Argentina takes UK to maritime tribunal, farming in Gaza, mental health update

This article is published in association with United Nations. Fewer people from West Africa are reaching Europe by sea, but the journey has not become safer, the UN migration agency (IOM) said on Tuesday. Arrivals from Mali, Senegal, Guinea and The Gambia fell by 59 per cent in the first half of 2026 compared with […]
© UN Ukraine The aftermath of a drone attack in a residential area in Kyiv on 12 October.

Ukraine: Residents killed and dozens injured in attacks on Kharkiv and Kyiv

This article is published in association with United Nations. Russian attacks in recent days on on Ukraine’s two largest cities have again killed and injured civilians, damaged homes and civilian infrastructure, the UN aid coordination office (OCHA) said on Tuesday. Aid workers and rescuers were on the ground in Kyiv and Kharkiv following aerial strikes that […]
© IOM The war in Sudan has created extreme levels of displacement, both internally and across Sudan’s borders.

‘Efficiency has limits’: UNHCR chief warns refugee protection is buckling under cuts

This article is published in association with United Nations. The money is running out faster than needs are growing: with 117 million men, women and children now forced from their homes, the UN refugee agency (UNHCR) has received just $3 billion of the $8.5 billion it needs this year – and its chief, Barham Salih, warns […]
© UNOCHA/Ramatoulaye Moussa Maz A woman walks through a camp for displaced people in Ituri Province in eastern DR Congo, where decades of violence have impacted millions, creating a humanitarian emergency.

Rise in poverty is ‘a wake-up call for the world’, UN development chief says

This article is published in association with United Nations. The number of people living in “multidimensional” poverty has risen for the first time in 15 years, reaching 1.2 billion, as families struggle to meet their basic needs.  The finding comes in the 2026 update of the global Multidimensional Poverty Index (MPI) published by the United Nations […]
© UNDP Nidaa with the chickens and ducks she raises in Gaza.

Sustaining livelihoods amid crisis in Gaza

This article is published in association with United Nations. Nidaa, Hanaa and Hanin have different stories, but share a common thread: the determination to build something of their own and keep it going despite extraordinary challenges facing them in war-ravaged Gaza. Following the devastation of the past three years, productive capacity in Gaza has been severely […]
© UNICEF/Oleksii Filippov A firefighter works on the balcony of a wrecked building in Kyiv, Ukraine.

World News in Brief: Russian attacks continue in Ukraine, Gazans shelter in flood-prone areas, keeping sight of eye health

This article is published in association with United Nations. UN human rights chief Volker Türk said on Thursday he was appalled by a wave of attacks that have killed civilians across Ukraine over the past four days.  They include a strike on two public buses in Kramatorsk on Thursday, that left at least 30 civilians dead, […]
This article is published in association with United Nations.

Ukraine: UN condemns latest attacks and calls for civilian protection

This article is published in association with United Nations. The UN Humanitarian Coordinator for Ukraine on Wednesday called for an end to attacks against civilians following further overnight strikes by Russian forces that reportedly killed at least 19 in the Chernihiv Region. Among the dead in Pryluky were five children, three of them babies, according to the […]
© UNICEF-SoP/Crickx People walk down a dusty road in the West Bank carrying belongings.

Israeli demolition in East Jerusalem displaces 69 Palestinians

This article is published in association with United Nations. Sixty-nine Palestinians – more than half of them children – were displaced on Tuesday after Israeli authorities green lit the demolition of their residential building in the At Tur area of East Jerusalem, the UN aid coordination office (OCHA) has reported. This is the highest number of […]
This article is published in association with United Nations.

‘The clock on AI regulation is ticking’, warns UN rights chief

This article is published in association with United Nations. The world is running out of time to put guardrails on artificial intelligence, UN High Commissioner for Human Rights Volker Türk warned Monday, as a “ruthless race” between companies and countries raises concerns about human safety and even humanity’s survival. Speaking in the UK at an AI […]
© UNOCHA/Alina Basiuk A school in Ukraine lies in ruins after being hit by a missile.

Ukraine war ‘a human rights catastrophe’ that must end, says Türk

This article is published in association with United Nations. Human Rights The war in Ukraine is a human rights catastrophe that is “growing and intensifying by the week” and threatening an even greater disaster across the region, UN High Commissioner for Human Rights Volker Türk said on Friday. Addressing the Human Rights Council in Geneva, Mr. […]
UN News Massive tent settlement of displaced residents extends along the damaged Gaza coastline.

Palestinians yearn for ‘a return to normal life’, says top Middle East peace envoy

This article is published in association with United Nations. The UN is continuing efforts to support Palestinians in Gaza amid major challenges to humanitarian access, reconstruction and the restoration of essential services, according to Ramiz Alakbarov, Acting UN Special Coordinator for the Middle East Peace Process. Speaking to UN News on the margins of the UN […]
©UNIFIL/Tilak Pokharel UNIFIL personnel distribute food kits to displaced families in Saida, Lebanon (file).

Lebanon: One in five children goes to bed hungry, says UNICEF

This article is published in association with United Nations. Four in five households in Lebanon struggle to afford basic necessities today, with children increasingly going without food, missing school and being pushed into work as conflict compounds years of economic crisis. “I wanted to buy clothes for my children, but I could not. I also wanted […]

World News in Brief: Deadly Myanmar strikes as Malaysia begins deportations, new emergency funding released, Gaza and West Bank update

The UN chief on Tuesday strongly condemned an airstrike that reportedly killed at least 50 people at a market in Myanmar’s Rakhine state and called for those responsible to be held to account. Forces from the military junta reportedly hit Kyauktaw township around midday on Monday, when the market’s more than 200 shops were busy […]

Why don't you drop your comment here?

Go back up

Discover more from The European Sting - Critical News & Insights on European Politics, Economy, Foreign Affairs, Business & Technology - europeansting.com

Subscribe now to keep reading and get access to the full archive.

Continue reading

Discover more from The European Sting - Critical News & Insights on European Politics, Economy, Foreign Affairs, Business & Technology - europeansting.com

Subscribe now to keep reading and get access to the full archive.

Continue reading

The European Sting – Critical News & Insights on European Politics, Economy, Foreign Affairs, Business & Technology – europeansting.com