International Earth Day

22 April is International Earth Day


2022 will mark the 51st year we celebrate Earth Day.

Whether it’s small personal changes or prioritising sustainable outcomes in business, having an Earth Day event will strengthen your commitment to the environment – and ICMI has a fantastic range of speakers to inspire and inform.

Our team has picked some of the most sought-after speakers in the fields of environment, climate change & the future below, but  you can find our full range below:

Browse all Environment & Climate Change speakers


Ronni Kahn AO

Social entrepreneur, best known for founding the food rescue charity OzHarvest

Simon Griffiths

Social enterprise/social change, entrepreneur, profit for purpose, raising capital, disruptive marketing, community building

Farah Mohamed

Award-winning social profit entrepreneur empowering youth, women and diverse populations

Dr Keith Suter AM

Global futurist, media commentator in national and foreign affairs

Tracee Hutchison

Award-winning TV/radio broadcaster, journalist & social justice, environment & creative industry advocate

Jon Dee

Social entrepreneur, founder of Planet Ark and Rock Aid

Amy Carter-James

An internationally renowned leader, advisor and entrepreneur, solving the climate crisis through business

Steve Sammartino

Futurist, TV host Channel 9
Dianne McGrath smiling

“It takes all of humanity to protect our one home”

Dianne McGrath
Mars explorer and sustainability pioneer


Craig Reucassel

Climate change series host on ABC TV, writer, comedian, member of The Chaser

Dr Tammie Matson

Conservationist, adventurer and world expert on elephants inspiring thousands of people, to achieve their dreams

Stephen Yarwood

Urban futurist and the former lord mayor of the City of Adelaide, SA

Dr Rebecca Huntley

Researcher, author and social commentator talking about climate change in a way that makes a difference

Sir Bob Geldof

Singer-songwriter, author, political activist

Dr Dianne McGrath

Embody sustainability: See (y)our world differently

Dr Bronwyn King AO

Unlocking purpose, performance and power
International Earth Day

What is Earth Day?


Following on from Earth Hour in late March, Earth Day is the annual event dedicated to awareness about the various environmental challenges that our planet currently faces.

Co-ordinated by the Earth Day Network, 193 countries around the world celebrate this important day, with many extending it to Earth Week and including events, activities and campaigns.


Dr David Suzuki CC OBC

Award-winning scientist, environmentalist, broadcaster and co-founder of the David Suzuki Foundation

Samantha Jewel

Climate solutions activist, carbon warrior and creator of the Climatefood initiative

Todd Sampson

Power of creativity, brain power

Sophie Thomson

ABC’s Gardening Australia presenter, a captivating and engaging speaker, columnist, writer, broadcaster, horticulturist and qualified naturopath

Paul Gilding

Environmentalist, consultant, author and a former executive director of Greenpeace International

Rachael Robertson

2nd Australian woman to ever lead an Antarctic expedition to Davis station, bestselling author

Dr Chadden Hunter

Produced some of the world’s most famous wildlife series including Planet Earth 1 & 2, winner of over 20 Emmys

Dr Anika Molesworth

Farming thought leader, researcher and future shaper
International Earth Day

Earth Day Theme 2022


The theme for Earth Day 2022 is ‘Invest in our Planet’, because as EarthDay.Org says:

Because a green future is a prosperous future.

We need to act (boldly), innovate (broadly), and implement (equitably). It’s going to take all of us. All in. Businesses, governments, and citizens — everyone accounted for, and everyone accountable. A partnership for the planet.

And while there is still time to solve the climate crisis, time to choose BOTH a prosperous and sustainable future, and time to restore nature and build a healthy planet for our children and their children, time is short.


Professor Jack Sim

Founder of the Restroom Association of Singapore, the World Toilet Organization, the World Toilet Day initiative and Bottom of the Pyramid

Clare Feeney

Sustainability strategist helping governments and businesses grow skills for a ‘just’ transition to a more equitable, profitable and sustainable future
New Zealand

Jason Clarke

One of the most sought-after creative minds in the country

Catherine Marriott

Well-respected leader in the Australian agricultural sector, elected Councillor of Shire of Broome WA, and former West Australian Rural Woman of the Year

Pete Ceglinski

CEO and founder of Seabin Project, creating solutions for cleaner oceans

Holly Budge

Adventurer, conservationist, inspirational speaker
New Zealand

Costa Georgiadis

Australia’s most famous landscape architect and TV presenter

Lyn White AM

Award winning advocate
International Earth Day

The History of Earth Day


In 1969, American senator Gaylord Nelson was flying over the Santa Barbara oil spill and was so shocked by the scale of it that he decided to create a day to help prevent future cases.

Many point to the first Earth Day, held in 1970, as the beginning of modern environmental activism.

Earth Day is now the world’s largest civic event.

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