compost club

Rated 5 out of 5 - Learnify X Webflow Template

Loved by 1,000+ zero waste leaders

Get Your Community to Fall Love with the Correct Compost Bin

A complete end-to-end behavior change program to transform your community to successful put their food scraps in the right bin.

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Bring the climate project you need to scale

Action School is a 6-week, live online program where you'll design, test, and refine your real-world climate program with expert guidance and a community of changemakers.

We've helped train and partnered with some of the world's most influential organizations

Hey, Climate Leader 👋
You could be accidentally using the least effective way to motivate your community to change

Illustration depicting that knowledge plus caring plus money does not motivate action, showing brains with glasses reading, holding a heart, and holding coins, with a sleeping brain below.

Illustration showing two cartoon brains with stressed expressions labeled 'Cognitive Load' and 'Bad Choice Architecture' with a note that these kill climate engagement.

Illustration highlighting three systems required to scale a movement: a brain holding a light bulb near a funnel labeled 'Funnel', a brain holding hands with a smiling heart labeled 'Social Influence', and a brain gesturing near a feedback icon labeled 'Feedback Loop'; text reads 'And missing the systems required to scale a movement = Systems to Scale'.

Live Support & The Community You Need

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Community

Join a community of world-leading climate and sustainability managers.

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Weekly Live Calls

Live Q&A with Katie and expert brains-trust to problem-solve and get feedback.

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Instant Support DM

DM Katie and other expert environmental psychology mentors for advice, questions, and feedback.

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Lifetime Access

No recurring fees. Get lifetime access to the courses, downloads, and community.

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Support Pods

Upon joining, you'll be assigned to a pod of 4 to 5 other members to provide weekly accountability, friendship, and ideas.

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Certificate of Graduation

Submit your action-optimized project upon completion to receive your official hard-copy graduation certificate from Hello World Labs.

What Our Members Are Saying

The Evidence

Behavior design is the missing link to effective climate engagement

Public disclosure of data

The EPA's mandatory disclosure of toxic chemicals caused a 45% reduction in chemical use over five years.

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Character animals

Characters that show a happy or sad expression depending on energy performance get a 47% better response than a color or number gauge.

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Real-time data

Real-time displays showing kWh got households to cut energy consumption by 8%.

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Money vs CO2:

Showing energy use in terms of CO2 from electricity gets a 16% better response than showing use in kWh amongst Democrat voters.

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Social imitation

Showing households how their energy use compared with their neighbors reduced energy consumption by 6.3% among the highest energy users.

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Ambient color

A light that communicates energy consumption using colored LEDs gets people to save 24% more electricity than showing energy use in numerical kWh.

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Commitment

Asking people to write down a pledge and posting it publicly increases a person's retention to that commitment by 74%.

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Goals

Asking pilots to achieve a specific fuel-saving goal got aircraft to reduce fuel use by 12%.

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Moving house

People are 27% more likely to take on a new green behavior after they move house.

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Geographic granularity

Comparing people of smaller and more similar groups, such as house vs house, saved 34% more energy than when shown grouping many residences.

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Block leader programs

Meta research shows that neighbor block leader programs are more influential than any other mechanism at encouraging conservation behavior.

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Guilt vs pride

Showing people their environmental performance is below average (guilt) gets a better response than showing people they perform above average (pride).

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