A tree DNA library could protect the world's forests

This team is building the world's biggest library of trees

07:28

Now playing

- Source: CNN

Paula Kahumbu: Voice of the wild

24:09

Now playing

- Source: CNN

Hyperrealistic paintings of animals promote conservation

04:09

Now playing

- Source: CNN

call to earth brazil conservation endangered forest spc_00004511.png

The award-winning conservationist fighting to save a forest

03:40

Now playing

- Source: CNN

call to earth ecotourism safari africa spc_00014408.png

Going green in one of Africa's top safari destinations

04:03

Now playing

- Source: CNN

call to earth day oceans highlights wrap 2 spc c2e intl_00002130.png

'Protect our oceans, protect our future': Young people come together for Call to Earth Day 2022

01:29

Now playing

- Source: CNN

vreni haussermann patagonia fjords c2e spc intl_00000000.png

Protecting Patagonia's precious fjords

01:58

Now playing

- Source: CNN

The 'Interceptor' capturing plastic trash at the source

03:23

Now playing

- Source: CNN

Cleaning up one of the world's most polluted waterways

03:50

Now playing

- Source: CNN

Restoring Hong Kong's oyster reefs

03:14

Now playing

- Source: CNN

Sylvia Earle: Diving for hope

24:00

Now playing

- Source: CNN

The Australian teenager making the ocean safer for sharks

03:22

Now playing

- Source: CNN

cte saving california's kelp forests video_00042927.png

Innovative ideas to preserve California's underwater forests

03:56

Now playing

- Source: CNN

gina moseley cave geology c2e spc intl_00003308.png

How the world's northernmost caves could hold answers to climate change

04:08

Now playing

- Source: CNN

The 15-year-old activist on a mission to help the planet

04:00

Now playing

- Source: CNN

How Namibia's elephants have adapted to life in the desert

04:01

Now playing

- Source: CNN

south africa plastic pollution litterboom project c2e spc intl_00004612.png

South Africa is battling plastic pollution in its rivers

04:06

Now playing

- Source: CNN

Listening to our planet

22:57

Now playing

- Source: CNN

Sound could help to avert human-elephant conflict in India

03:15

Now playing

- Source: CNN

Why sound can be vital in understanding elusive species

04:09

Now playing

- Source: CNN

This man has made it his mission to listen to the Earth

04:20

Now playing

- Source: CNN

call to earth day 2022 explainer spc intl_00000000.png

What is Call to Earth Day 2022?

01:48

Now playing

- Source: CNN

A tiny Caribbean island is reviving its coral reefs

04:02

Now playing

- Source: CNN

Scuba diving scientist shines a light on the world's deep sea reefs

04:07

Now playing

- Source: CNN

Bamboo shark breeding helps repopulate Thailand's reefs

03:34

Now playing

- Source: CNN

How Thailand's most famous bay recovered from the brink of ecological catastrophe

04:01

Now playing

- Source: CNN

This rescue center is helping the world's most trafficked mammal

03:46

Now playing

- Source: CNN

A veiled chameleon, Chamaeleo calyptratus, at Rolling Hills Wildlife Adventure confronts a camera lens.
061113_s_RollingHills_zoo_06456.jpg

The photographer documenting mass extinction

03:20

Now playing

- Source: CNN

Meet Mexico's 'bat man'

03:51

Now playing

- Source: CNN

Protecting nature's highways

23:01

Now playing

- Source: CNN

Protecting birds' migration routes

03:45

Now playing

- Source: CNN

How animals cross one of the world's longest roads

04:07

Now playing

- Source: CNN

A wildflower corridor across the UK could help save bees and butterflies

02:12

Now playing

- Source: CNN

Protecting the world's tallest palms

03:41

Now playing

- Source: CNN

Why fishing communities in Belize are defending sharks

03:38

Now playing

- Source: CNN

The OceanXplorer ship, part of hedge fund founder, Ray Dalio's OceanX research mission

Hedge fund titan, Ray Dalio, on taking the plunge into ocean exploration

03:40

Now playing

- Source: CNN

Watch 3 decades of melting glaciers in one dramatic video

03:48

Now playing

- Source: CNN

Inside New Zealand's penguin rescue and rehab center

03:43

Now playing

- Source: CNN

kehkashan basu green hope foundation video card

Foundation gives 'Green Hope' around the world

04:00

Now playing

- Source: CNN

Bringing back Andean condors from the brink of extinction

04:02

Now playing

- Source: CNN

jeremy shelton freshwater fish 04 video card

The untold story of South Africa's rivers

03:48

Now playing

- Source: CNN

In Thailand, these tigers are coming back with a roar

04:04

Now playing

- Source: CNN

New Zealand sea lions are back, and they're reclaiming human spaces

03:36

Now playing

- Source: CNN

Jaguars in Belize need this forest corridor to survive

04:07

Now playing

- Source: CNN

Tribal warriors become lion defenders

03:49

Now playing

- Source: CNN

The mountainous region of Gilgit-Baltistan is prime snow leopard habitat. Hussain estimates there around 30-50 snow leopards in the region around the 26 villages where he and his team work. Although it's hard to track these elusive animals, he says that at the moment the population is stable.

Protecting Pakistan's elusive snow leopards

04:00

Now playing

- Source: CNN

Cinematographer Shawn Heinrichs is inspiring people to protect our oceans

03:19

Now playing

- Source: CNN

Bringing back wolves to a Portuguese valley

03:09

Now playing

- Source: CNN

The snowboarder fighting to protect our winters

04:05

Now playing

- Source: CNN

A young cub alongside an adolescent male. The first cubs to be born at Samara in nearly 200 years are now approximately two years old.

Samara Private Game Reserve: How one family's rewilding project returned big cats to the Great Karoo

03:57

Now playing

- Source: CNN

Full of biodiversity, deserts also deserve protection

03:24

Now playing

- Source: CNN

The astronaut caring for 'spaceship Earth'

04:04

Now playing

- Source: CNN

Icelandic company is turning CO2 into stone

04:07

Now playing

- Source: CNN

An energy plant so clean, you can ski there

03:48

Now playing

- Source: CNN

Why scientists are breeding some of the ocean's top predators

03:50

Now playing

- Source: CNN

shahriar caesar rahman bangladesh turtle conservation c2e spc intl_00001225.png

Slow and steady wins the race: restoring Bangladesh's endangered turtle and tortoise species

03:15

Now playing

- Source: CNN

See how whiskey brought these oysters back to life

03:31

Now playing

- Source: CNN

call to earth day highlights wrap 1 spc intl c2e_00001812.png

Young people are protecting the planet on Call to Earth Day

01:54

Now playing

- Source: CNN

James Cameron wants to preserve the ocean twilight zone

04:33

Now playing

- Source: CNN

Harry Chan, Hong Kong's self-proclaimed "ghost net hunter," diving in Sai Kung.

Meet Hong Kong's 'ghost net hunter'

04:06

Now playing

- Source: CNN

An Indian entrepreneur has a portable solution for fighting air pollution

03:28

Now playing

- Source: CNN

This startup makes packaging from seaweed

03:59

Now playing

- Source: CNN

potato custodians peru spc intl c2e_00034029.png

'Potato custodians' are safeguarding this crop's future

04:15

Now playing

- Source: CNN

fonio grain diakate c2e spc intl_00000518.png

Fonio: The superfood that's a kernel of hope for the Sahel

03:57

Now playing

- Source: CNN

breadfruit hawaii spc intl c2e_00003017.png

Breadfruit: A new chapter for Hawaii's tree of life

04:08

Now playing

- Source: CNN

5 ways to help the planet by changing your diet

03:11

Now playing

- Source: CNN

ColdHubs are keeping food fresh in Nigeria

04:10

Now playing

- Source: CNN

rodrigo pacheco c2e spc intl_00003925.png

This chef has a recipe for greener eating

03:41

Now playing

- Source: CNN

Meet Matilda Ho, the food disruptor changing tastes in China

03:15

Now playing

- Source: CNN

The islanders saving bees for a sustainable future

03:21

Now playing

- Source: CNN

Invasive lionfish are bad for local sea life -- but good for eating

04:07

Now playing

- Source: CNN

The science helping New Yorkers and whales live in harmony

03:31

Now playing

- Source: CNN

seahorse yellow amanda vincent 3 RESTRICTED

Scientist's crusade to protect seahorses

04:23

Now playing

- Source: CNN

sebastiao salgado interview c2e spc intl_00002922.png

Sebastião Salgado's Amazonian odyssey

03:41

Now playing

- Source: CNN

Cape Cormorants c2e spc intl _00000217.png

The Cape cormorant rescue mission on Robben Island

03:35

Now playing

- Source: CNN

Ellipsis drone trash cte spc intl_00011510.png

UK startup uses drones to map plastic pollution

03:36

Now playing

- Source: CNN

One woman's mission to help solve India's deadly conflict between people and wildlife

03:50

Now playing

- Source: CNN

One man's mission to make treasure out of trash

04:04

Now playing

- Source: CNN

CNN values your feedback

How a library of tree DNA could protect the world’s forests