Sustainability Open Hours

Tuesdays 9am - 11am

Have questions or want to share comments about sustainability initiatives in Mill Valley or Tiburon? Come speak to the Climate Action Coordinator during virtual open hours! They will operate on a first come first serve basis and be held weekly via Zoom.

Register for the meetings

Get Ready for the 2025 Marin Commutes Spring Challenge!

The Marin Commutes Spring Commute Challenge is back for 2025! From now until May 31st, log your sustainable trips to earn rewards and help build a cleaner, healthier, less congested Marin County!  

Why Participate? 

• Feel the Season: Embrace the season of renewal and make the most of the extra daylight with an active commute to boost your health and reduce stress!  

• Rediscover Marin: Marin County is a beautiful place to bike ride and walk, and sustainable trips help keep it that way! 

• Inspire Others: Whether you're hopping on a bike, trying bikeshare or starting a carpool or vanpool, your commute choices can motivate friends, coworkers, and neighbors to rethink how they get around. 

• Exciting New Rewards: Enter weekly drawings for a $50 gift card, log trips during special challenge periods to get 2x or even 3x multipliers towards year-round rewards and compete for a $300 Grand Prize gift card! 

• Share Your Story: Tell us about your commute on social media with the hashtag #MarinCommutes – the first 10 posters will receive a $25 gift card

Ready to spring into motion? Learn more at https://marincommutes.org/rewards/spring-commute-challenge/

Over 450 lbs of Clothing Found New Homes at the Re-loved and Re-sourced Market!

Thank you to everyone who donated, browsed, or swapped at the Re-loved and Re-sourced Market on April 27th! Thanks to your participation, over 450 pounds of the nearly 480 pounds of donated clothing were re-homed and given a second life through our free clothing swap. That’s hundreds of garments kept out of landfills and redirected into our community, where they’ll continue to be worn, loved, and reused.

Want to see more events like this or have an idea for a sustainability-focused event or community program? We’d love to hear from you! Fill out our quick survey

The 5 R's of Reducing Waste



Looking to keep your momentum from Earth Day going year-round? Set achievable goals for actions within your sphere of control. We suggest setting a goal to kick your single-use coffee cup habit and instead bring your own thermos, or ask for your drink “for here” if you’re planning to sit down for awhile.

Not only will switching to reusables help the environment, it’s also better for your health: paper coffee cups are lined with a plastic layer to prevent the liquid from leaking, but studies have shown that this layer releases microplastics and chemicals into your drink. This plastic layer also means that paper coffee cups cannot be recycled or composted.

How can you make a new habit, like bringing your reusable thermos to your favorite café, stick? Here are some tips to make a new habit stick:

1. Make your goal specific: Vague goals are hard to measure and stick to, while being specific can help you succeed. For example, “I will bring my reusable thermos to one coffee run per week.”

2. Get friends involved: Make your habit more fun by making it social! For example, text a friend to try out a new coffee shop with a plan to both bring a reusable thermos.

3. Allow for flexibility: A very rigid plan can be hard to stick to, and might make you feel like missing one goal means it’s time to give up on the whole thing. Allow yourself some flexibility and grace, and then get back on track without giving up entirely.

Check out the Eco-Friendly Garden Tour!

May 10th 10am - 4pm

The Eco-Friendly Garden Tour is a program that promotes sustainable landscaping practices by showcasing inspiring gardens throughout Sonoma and Marin counties. The Tour highlights Russian River-Friendly and Bay-Friendly landscaping best practices, and supports Qualified Water Efficient Landscaper certified professionals by featuring their personal or client’s gardens.

See which gardens are on this year’s garden tour!

In order to attend the garden tour, you must register. Once registered, you will receive a registration email with garden tour information.

Induction Cooking Demonstration

May 13th 6:30pm - 7:30pm at Fairfax Library

Chef and nutrition educator Cindy Gershon will talk about the ease and benefits of cooking on an induction stove while she makes two delicious dishes for you to try. Induction cooking is more energy efficient, safer to use, and easier to clean up!

By the way, did you know you can check out an induction cooktop from the library? 

Shoreline Adaptation

Mill Valley is proactively planning for the growing risks of coastal flooding and rising groundwater with its first Sea Level Rise Shoreline Vulnerability Assessment and Adaptation Framework. Funded by a grant from the Ocean Protection Council, this effort will help the City understand local flood hazards and develop strategies to protect the shoreline.

The City is currently seeking proposals from expert consultants to assess vulnerabilities, propose adaptation solutions, and engage the community in shaping a resilient future. Learn more about this project and check out additional resources.

Stay informed! Sign up for email updates on Mill Valley’s sea level rise projects.

Marin Sustainability Tracker

Are you familiar with the Marin Sustainability Tracker? This tool from the Marin Climate and Energy Partnership (MCEP) is an interactive map that shows how each jurisdiction is doing in terms of sustainable development. It covers categories such as energy, transportation, greenhouse gas emissions, waste, and water.

Check out the tracker here

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Keep updated on local sustainability efforts and how you can get involved

For more events check out the Marin Climate Event Calendar