ride

Rated 5 out of 5 - Learnify X Webflow Template

Loved by 1,000+ zero waste leaders

An active transport program that makes more bikes and less cars like a game

A complete end-to-end behavior change program to encourage more cycling and less car use in your city

Inquire Now

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

Four user icons connected by arrows forming a circle around two overlapping speech bubbles, symbolizing communication and collaboration.

Community

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

White line icon of a female video chat in a browser window on an orange circular background.

Weekly Live Calls

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

Two white speech bubbles with three dots inside each, on a yellow circular background.

Instant Support DM

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

White silhouette of a sun setting over water with clouds, inside a green circular background.

Lifetime Access

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

White line drawing of three people sitting and connecting arms over an oval table on a green circular background.

Support Pods

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

Icon of a certificate or document with a ribbon seal on a blue-green circular background.

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.

Simple cartoon illustration of a small yellow chick facing left.

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.

Simple round clock showing 10:30 with orange hands on a beige face and dark brown background.

Real-time data

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

Stacks of green paper currency with a white band around one stack.

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.

Two smiling faces, one blue and one orange, with yellow lines indicating a cheerful connection.

Social imitation

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

Traffic light with red, yellow, and green lights from top to bottom.

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.

Icon of a notepad with two orange lines and a large pencil in front.

Commitment

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

A red and white target with an arrow hitting the bullseye.

Goals

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

Simple illustration of a house with red roof, orange door, window, and green bushes in front.

Moving house

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

Location pin icon over a simplified green map on a teal and beige background.

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.

Three illustrated people sitting together and smiling, with abstract colorful shapes in the background.

Block leader programs

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

Illustration of a smiling pink sun behind a sad blue rain cloud with raindrops.

Guilt vs pride

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

Apply to Get Energy Lollipop in Your Community