Take part in the Million Mangrove Challenge 🌱

Help us plant 1,000,000 trees

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10 free trees if you sign up today

Sign up today and we’ll plant 10 free trees in your name

Start your journey to help save the ocean and fix the climate today

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As seen in

“Most innovative not-for-profit organizations of 2022”

A global community, committed to a brighter future

343,865 km²

Ocean protected

1,421,578

Trees planted

42,283 kg

Plastic removed

25,354

Corals planted

3,475.7 t

Carbon reduced

Why you’ll love Only One

  • Grow your own forests and reefs
  • Remove plastic and carbon pollution
  • Learn how to help save the planet
  • Plans from $9.00/mo
100% of your funds go to impact

01

Grow your own ocean forests and reefs

See your impact come to life with precise tracking and updates from the field.

Get started

Why grow an ocean forest

4x more carbon

stored by ocean forests than a tropical rainforest on land

You planted 24 trees in Senegal

Unique ID: #32756

You planted 2 corals in Mo'orea

Unique ID: #2847

Why grow an ocean forest

4x more carbon

stored by ocean forests than a tropical rainforest on land

You planted 24 trees in Senegal

Unique ID: #32756

You planted 2 corals in Mo'orea

Unique ID: #2847

02

Remove plastic and carbon pollution

Help tackle the climate crisis and stop plastic waste choking the ocean.

Get started
You removed 3kg of plastic in India

Unique ID: #4785

You reduced emissions by 2.5t in Cambodia

Unique ID: #1847

In just one month

480 miles flown

you can reduce carbon emissions equal to

In just one month

480 miles flown

you can reduce carbon emissions equal to

You reduced emissions by 2.5t in Cambodia

Unique ID: #1847

You removed 3kg of plastic in India

Unique ID: #4785

03

Learn how you can help save the planet

Hear from inspiring activists and expert conservationists on steps we can all take.

Get started
Inka Cresswell, Wildlife Filmmaker
Titouan Bernicot, Coral Gardeners
Inka Cresswell, Wildlife Filmmaker
Titouan Bernicot, Coral Gardeners

Why you’ll love taking action with us

  • Join the largest community of ocean activists
  • Get live updates on campaign milestones
  • Stand with groups who have fought for decades
  • Unite to win global campaigns!

Partner with us on a campaign

Hear from our community

Together, we’re an unstoppable force for change.

For anyone looking to take action for our ocean and our climate, Only One gives us incredible tools to make a difference and track our individual impact.

Lauren Russell
Actress, Ocean advocate
Los Angeles, United States

Only One extends inspiration into tangible, traceable action for all of us.

Carissa Cabrera
Marine biologist, TikTok creator
Kailua, Hawai'i

Intuitive, informative, elegant. Taking action to save our planet is ‘Only One’ click away and I can’t stop smiling!

Ümit Hardal
Explorer, Artist, Activist
Copenhagen, Denmark

Only One is awesome. It’s great to have an easy place to go, make change, and learn about what we can all do in our every day lives.

Kelsey Williamson
Photographer
Oahu, Hawai'i

10 free trees if you sign up today

Sign up today and we’ll plant 10 free trees in your name

Get started with simple, impactful action for the planet today

Get started

Get involved

Make a single donation

Help restore the ocean and tackle the climate crisis by supporting all of our work

Subscribe to a monthly plan

Simple, impactful action for the planet with a profile where you can see your impact grow

Learn more about us

We’re a registered charity and global community on a mission to combat the ocean and climate crisis