So you’ve decided you want to actually *understand* climate change — not just scroll past alarming headlines, but genuinely understand what’s happening and what you can do about it. Well this is your lucky day, friend! Let me show you where to find reputable online climate change courses, from no cost, to low cost, to professional certificates.
There are more high-quality climate courses available online today than ever before. Though the landscape is a bit of a jungle — you’ve got everything from free UN courses up to $14,320 Harvard certificates.
We’ve sorted the best options into three tiers so you can find exactly what fits your goals, your schedule, and your budget. Whether you’re a curious student or homeowner, a small business owner trying to understand your climate risk, or someone thinking about making a career out of it, there’s something here for you.
Tier 1: Free Courses — Start Here (They’re Good!)
Don’t let “free” fool you. Some of the best climate education on the planet comes at zero cost, courtesy of the United Nations, NASA, MIT, and a handful of top universities that have decided the world needs climate-literate citizens more than it needs tuition revenue.
Most of these courses include real completion certificates — so you can demonstrate your interest on your job or school application.
A few standouts:
- UN CC:Learn is the Swiss Army knife of free climate education. Courses run from beginner overviews to highly technical topics like national adaptation planning and ecosystem-based resilience. Interestingly, the UN produces quite a lot of climate change courses and content. A lot of it is aligned with the UN’s Sustainable Development Goals (SDGs).
- NASA ARSET free courses teach you to use actual satellite data to monitor climate change — land cover change, sea level, wildfire risk, you name it. It’s free, it’s NASA, and you’ll feel like a scientist by the end of it. 😉
| Organization | Representative Courses | URL | Cost |
|---|---|---|---|
| Coursera | Climate Science for Everyone (Duke); Bending the Curve: Climate Change Solutions; Climate Change and Global Affairs; Natural Disaster and Climate Change Risk Assessment | coursera.org | Many free to audit; subscription -or- fee for certificates |
| ecoAmerica Network | For health professionals and advanced laypersons. | ecoamerica.org | Free (completion certificates) |
| edX / SDG Academy | Climate Change: The Science and Global Impact; Planetary Boundaries and Human Opportunities | edx.org/sdgacademy | Free to audit; ~$50 to $300 for verified certificate |
| FutureLearn | Climate Change: Challenges and Solutions (Univ. of Exeter); Climate Change Solutions; Climate Change: The Facts | futurelearn.com | Free and paid courses |
| MIT OpenCourseWare | Global Warming Science; Earth Systems and Climate Science collection; Climate Science, Risk & Solutions | ocw.mit.edu | Free (no certificate) |
| NASA ARSET | Remote Sensing for Climate Change Monitoring; Fundamentals of Remote Sensing; Land Cover / Land Use Change | earthdata.nasa.gov/arset | Free (completion certificates) |
| UN Climate Change Learning Partnership | Climate Change: From Learning to Action; Mastering National Adaptation Plans; Human Health and Climate Change; Building Climate Resilience through Ecosystem-based Adaptation | uncclearn.org | Free (certificates included) |
| UNEP-DHI Partnership Centre on Water and Environment | UNEP Certificate Course on Nature Based Solutions for Disaster and Climate Resilience | https://pedrr.org/ | Free (certificate included) |
| UN SDG:Learn / UNITAR | Strengthening Climate Adaptation and Resilience; Financing Local Adaptation; International Climate Change Negotiations | unsdglearn.org | Free (certificates included) |
| University of Tasmania | The Climate Shift: Exploring Science, Empowering Action (MOOC) | utas.edu.au | Free (digital badge) |
Tier 2: Low-cost Paid Courses
You’ve done the free stuff and want to go deeper — or you want a certificate with a real institution’s name on it — but you’re not ready to plunk down $14K on a Harvard certificate. This is your tier. (You could also explore some of the paid options from Tier 1.)
Tier 2 courses are self-contained, affordable courses on the major learning platforms. Most take a few hours to a few weeks to complete, cost between $20 and a few hundred dollars, and are perfectly suited for professionals who want to get up to speed fast or add a credible line to their resume without enrolling in a degree program.
Standouts in this category:
- ecoAmerica Network – hosts climate change courses for professional organizations from the American Public Health Association, to Alliance of Nurses for Healthy Environments, to Climate Mayors, to the Evangelical Lutheran Church, to Kaiser Permanente, and other local and national organizations. I took the Extreme Heat & Health course, and it was fantastic (and free)!
- GARP SCR® Certificate — if you work in finance, risk, banking, or insurance, this is the climate credential you want. The Sustainability and Climate Risk (SCR®) certificate was developed with input from S&P Global, Bloomberg, and J.P. Morgan, and it covers everything from climate risk measurement and scenario analysis to net-zero frameworks and green finance. It’s the finance industry’s answer to the CC-P®: rigorous, respected, and purpose-built for risk professionals who need to speak the language of both climate science and capital markets. (GARP also has a great podcast.)
| Organization | Representative Courses | URL | Cost |
|---|---|---|---|
| Coursera (subscription) | Climate Change and Global Affairs (Council on Foreign Relations); Exploring Our Responses to Climate Change (Univ. of Colorado Boulder); ESG and Climate Change (Wharton/UPenn); Bending the Curve: Climate Change Solutions (UC San Diego) | coursera.org | Subscription -or- fee for certificates; many free to audit |
| ecoAmerica Network | APHA Climate for Health Ambassador Training; Extreme Heat & Health: Strategies for Prevention and Action; AME Blessed Tomorrow Climate Ambassador Training; BRACE: A Public Health Model for Climate Action | ecoamerica.org | Free (completion certificates), and CE credits for professionals. |
| edX (Professional Certificates) | Climate Change: The Science Behind the Crisis (Tel Aviv University); Climate Change: Financial Risks and Opportunities (Imperial College Business School) | edx.org | ~$340–$1,500 per certificate program |
| LinkedIn Learning | Climate Change: A Top ESG Concern; Climate Technology for Business Resilience and Adaptation; Climate Adaptation and the Cost of Inaction (BCG); The Business Value of Action on Climate and Sustainability | linkedin.com/learning | ~$40/month or ~$240/year (subscription) |
| Udemy | Climate Change Risk Management; Climate Change Explained: Causes, Consequences and Solutions; Climate Risk Management” The Ultimate Guide; Corporate ESG and Sustainability Masterclass; Carbon Accounting: GHG Emissions Scope 1 & 2 | udemy.com | Various fees, per course |
| GARP SCR® Certificate | Sustainability and Climate Risk (SCR®): climate risk measurement, scenario analysis, net zero, carbon accounting, green finance | garp.org/scr | $650 (exam fee) |
Tier 3: Serious Credentials — Graduate-Level, Graduate-Price
These are for people who mean business – and want to learn it. We’re talking university certificate programs, multi-course sequences, and professional credentials that carry real institutional weight. They take months, cost thousands of dollars, and are absolutely worth it — *if* this is the direction you’re heading.
If you’re transitioning into climate policy, public health, corporate sustainability, or climate finance, this may be where you build a credential that opens doors. I’ve never heard of the ACCO, but it makes sense that they would exist. Personally, I’d go for the GARP SCR Certificate over the CC-P, at least until I knew more. If you are familiar with either of these, please leave a detailed comment (thanks!).
| Organization | Representative Courses | URL | Cost |
|---|---|---|---|
| Yale School of Public Health | Climate Change and Health Certificate | ysph.yale.edu/cchcert | $3,500 |
| Harvard Extension School | Managing for Climate Change Graduate Certificate | extension.harvard.edu | $14,320 |
| Association of Climate Change Officers (ACCO) | Certified Climate Change Professional® (CC-P) | climateofficers.org | $495 self-study / $745 live online; plus exam fees |
Where to Start
Start with Tier 1 if: You’re new to this topic, have zero budget, or just want to test the waters. Begin with one of the many UN CC:Learn or MIT courses, and you’ll be better informed than 90% of the world’s population within a few weeks.
Move to Tier 2 if: You’ve got the basics down and want something more structured, career-relevant, or platform-credentialed. Coursera Plus and LinkedIn Learning are excellent value on a subscription. Udemy’s one-time course prices are a steal when they go on sale (which is often), though the quality of Udemy can vary widely. If you’re in finance or risk management, the GARP SCR® certificate deserves serious attention. And if you are a public health or medical professional, the ecoAmerica courses look great.
Go to Tier 3 if: You’re making a real career move into climate work, you want graduate-level rigor, and you’re ready to invest. Yale’s public health certificate is excellent for health and policy professionals.
The climate is changing whether or not we take a course about it. The difference is whether you’re in the passenger seat or the driver’s seat. Pick a tier, pick a course, and get started — there’s no better time than right now.
Secret Tier 4: Shhh, don’t tell anyone…
You can *make* your own customized curriculum! Stay tuned for an upcoming post on this topic…
There are probably a lot more climate courses out there these days. If you know of a good one, drop it in the comments below — we’d love to keep this list growing.
If you want more free learning on climate, check out these resources…