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Cutting our Greenhouse Gas Emissions to Zero

Cutting our Greenhouse Gas Emissions to Zero

Most experts agree that the key to avoiding worsening effects from a changing climate is to cut greenhouse gas emissions to zero. Explore how scientists approach the challenge, and discover the technologies that can help get us there.
Clip Length 04:52 Premiere: 6/19/20

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Major funding for NOVA is provided by the David H. Koch Fund for Science, the NOVA Science Trust, the Corporation for Public Broadcasting, and PBS viewers.

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NOVA

About NOVA

NOVA brings you stories from the frontlines of science and engineering, answering the big questions of today and tomorrow, from how our ancestors lived, to whether parallel universes exist, to how technology will transform our lives. Visit the official website to watch full-length documentaries, or explore our world through short-form video, on our digital publication NOVA Next.

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Why Ships Crash

Nova investigates the 2021 crash of the Ever Given container ship in the Suez Canal and its impact.

  • Sunday May 22, 2022 7:00 pm ET on KET2
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Ice Age Footprints

Thousands of prehistoric footprints in New Mexico's White Sands National Park capture moments when Ice Age humans crossed paths with enormous ground sloths and mammoths.

  • Wednesday May 25, 2022 9:00 pm ET on KET
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Touching the Asteroid

Premiered On: 10/21/2020

Scientists attempt to grab a piece of an asteroid and bring it to Earth using spacecraft OSIRIS-REx.

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Great Escape at Dunkirk

Premiered On: 02/14/2018

Join archaeologists and divers recovering remains of ships and planes lost during World War II's epic Dunkirk operation. Discover new evidence of the ingenious technology that helped save Allied forces from defeat by the encircling Germans.

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Dead Sea Scroll Detectives

Premiered On: 11/06/2019

Scientists use new technology to examine the ancient Dead Sea Scrolls and newly surfaced fragments.

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Polar Extremes

Premiered On: 02/05/2020

Uncover the bizarre history of the poles, from miles-high ice sheets to warm polar forests teeming with life.

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Petra - Lost City of Stone

Premiered On: 02/18/2015

Experts carve a temple-tomb to find out how the ancient people of Petra built their city of stone.

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Why Ships Crash - S49 E9

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Dinosaur Apocalypse: The Last Day - S49 E7

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Dinosaur Apocalypse: The New Evidence - S49 E6

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Hindenburg: The New Evidence - S48 E6

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Can We Cool the Planet? - S47 E16

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Hagia Sophia - Istanbul's Ancient Mystery - S42 E4

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Top

Season Episodes

Why Ships Crash
S49 E9 Length 53:31 Premiere Date 5/18/22

Dinosaur Apocalypse: The Last Day
S49 E7 Length 53:33 Premiere Date 5/11/22

Dinosaur Apocalypse: The New Evidence
S49 E6 Length 53:33 Premiere Date 5/11/22

Determined: Fighting Alzheimer's
S49 E5 Length 53:28 Premiere Date 4/6/22

Augmented
S49 E4 Length 1:25:02 Premiere Date 2/23/22

Great Mammoth Mystery
S49 E3 Length 53:26 Premiere Date 2/16/22

Secrets in the Scat
S49 E2 Length 53:32 Premiere Date 2/9/22

Arctic Sinkholes
S49 E1 Length 53:28 Premiere Date 2/2/22

Surviving an Elevator Fall
Clip Length 01:31 Premiere Date 8/23/10

Shabbat Elevator
Clip Length 02:42 Premiere Date 8/23/10

Six Questions with David Pogue
Clip Length 02:33 Premiere Date 1/4/11

A Mind for Music
Clip Length 04:05 Premiere Date 2/9/11

Modeling a Comet Airburst
Clip Length 03:20 Premiere Date 2/9/11

Green Energy in China
Clip Length 05:09 Premiere Date 4/12/11

A Strict Carbon Diet
Clip Length 02:58 Premiere Date 4/12/11

Brian Greene Answers Your Questions
Clip Length 01:07 Premiere Date 8/2/11

The 9/11 Memorial Mock-Up
Clip Length 01:54 Premiere Date 8/24/11

Solving an Engineering Problem
Clip Length 02:49 Premiere Date 8/24/11

Walls of Glass
Clip Length 02:29 Premiere Date 8/24/11

The Memorial Plaques
Clip Length 02:31 Premiere Date 8/24/11

Rebuilding 7 World Trade Center
Clip Length 01:48 Premiere Date 8/31/11

Specials

Picture a Scientist (with Audio Description)
Length 1:52:37 Premiere Date 4/14/21

Looking for Life on Mars (with Audio Description)
Length 53:46 Premiere Date 2/24/21

Beyond the Elements: Life (with Audio Description)
Length 53:17 Premiere Date 2/17/21

Beyond the Elements: Indestructible (with Audio Description)
Length 53:17 Premiere Date 2/10/21

Beyond the Elements: Reactions (with Audio Description)
Length 53:17 Premiere Date 2/3/21

Secrets in our DNA (with Audio Description)
Length 53:26 Premiere Date 1/13/21

Treasures Metals Eiffel Tower
Length 02:09 Premiere Date 12/9/16

A Labyrinth of Lava
Length 01:13 Premiere Date 11/2/15

From Mud to Rock
Length 01:36 Premiere Date 10/22/15

Finding Stromatolites
Length 01:23 Premiere Date 10/22/15

Stromatolites Were Kings
Length 01:05 Premiere Date 10/22/15

Ancient Life
Length 00:28 Premiere Date 10/22/15

Millions of Years Captured in Chalk
Length 01:17 Premiere Date 10/22/15

A Fourteen-Foot Fish From Kansas
Length 01:38 Premiere Date 10/22/15

Hell Creek Formation
Length 01:10 Premiere Date 10/22/15

No Dinosaurs Above the Line
Length 02:00 Premiere Date 10/22/15

Mammal Survivors
Length 01:40 Premiere Date 10/22/15

Dinosaur Fossils
Length 01:53 Premiere Date 10/22/15

King of Gore
Length 02:00 Premiere Date 10/22/15

Driving Dinosaur Diversity
Length 01:47 Premiere Date 10/22/15

Pangea
Length 00:56 Premiere Date 10/22/15

Making Granite From Volcanic Rock
Length 02:16 Premiere Date 10/22/15

A Massive Volcanic Eruption
Length 01:14 Premiere Date 10/22/15

Rock Time Capsules
Length 01:18 Premiere Date 10/21/15

The Sandstone Top of the Canyon
Length 01:15 Premiere Date 10/21/15

Fossil-Filled Limestone
Length 00:54 Premiere Date 10/21/15

The Grand Canyon's Oldest Rocks
Length 00:19 Premiere Date 10/21/15

From Lava to Land
Length 02:14 Premiere Date 10/21/15

Semi-Precious Pebbles
Length 00:57 Premiere Date 10/21/15

Five Steps of Volcanic Rock
Length 00:26 Premiere Date 10/21/15

Tearing North America Apart
Length 01:01 Premiere Date 10/21/15

Fossilized Sand Dunes
Length 01:15 Premiere Date 10/21/15

Volcanoes of Sand
Length 01:33 Premiere Date 10/21/15

Rockies 2.0
Length 02:00 Premiere Date 10/21/15

Manhattan Schist
Length 01:13 Premiere Date 10/21/15

Manhattan Skyline
Length 00:52 Premiere Date 10/21/15

New York's Mountains
Length 01:13 Premiere Date 10/21/15

Monument Rocks 2
Length 01:48 Premiere Date 8/2/15

Exuma Cays 1
Length 01:26 Premiere Date 8/2/15

Exuma Cays 3
Length 00:28 Premiere Date 8/2/15

Exuma Cays 4
Length 03:22 Premiere Date 8/2/15

Gooseberry Falls 1
Length 00:57 Premiere Date 8/2/15

Gooseberry Falls 2
Length 00:24 Premiere Date 8/2/15

Gooseberry Falls 3
Length 01:06 Premiere Date 8/2/15

Gooseberry Falls 4
Length 01:01 Premiere Date 8/2/15

Mount Kilauea
Length 01:30 Premiere Date 8/2/15

Grand Canyon 1
Length 01:19 Premiere Date 8/2/15

Grand Canyon 2
Length 01:05 Premiere Date 8/2/15

Grand Canyon 3
Length 00:58 Premiere Date 8/2/15

Grand Canyon 4
Length 00:19 Premiere Date 8/2/15

Mendenhall Glacier
Length 02:51 Premiere Date 8/2/15

Monument Rocks 1
Length 01:18 Premiere Date 8/2/15

Lethal Seas Excerpt 4
Length 00:51 Premiere Date 5/12/15

Lethal Seas Excerpt 1
Length 04:11 Premiere Date 5/12/15

Lethal Seas Excerpt 2
Length 01:00 Premiere Date 5/12/15

Lethal Seas Excerpt 3
Length 00:35 Premiere Date 5/12/15

The Mother of Hubble
Length 02:28 Premiere Date 4/14/15

Formation of a Typhoon
Length 01:34 Premiere Date 6/25/14

Flatfish Larvae
Length 00:51 Premiere Date 5/6/14

RNAi Explained
Length 01:47 Premiere Date 4/22/14

Dolphin Mirror
Length 03:18 Premiere Date 4/22/14

Dogs' Sense of Time
Length 01:28 Premiere Date 4/13/14

Cockatoo Excerpt
Length 01:30 Premiere Date 4/8/14

How Solar Cells Work
Length 00:33 Premiere Date 2/26/14

Solar Power's Promise
Length 00:51 Premiere Date 2/26/14

Microneedle
Length 01:41 Premiere Date 12/30/13

GM Plants
Length 01:27 Premiere Date 11/15/13

Non-Newtonian Gel
Length 01:00 Premiere Date 11/15/13

Soft-Story Buildings
Length 07:36 Premiere Date 11/13/13

Animal Robot 1
Length 02:35 Premiere Date 10/24/13

Animal Robot 2
Length 02:02 Premiere Date 10/24/13

Therapeutic Hypothermia
Length 01:11 Premiere Date 10/24/13

Therapeutic Hypothermia 2
Length 01:07 Premiere Date 10/24/13

Therapeutic Hypothermia 3
Length 01:43 Premiere Date 10/24/13

Therapeutic Hypothermia 4
Length 02:01 Premiere Date 10/24/13

Levitation
Length 00:50 Premiere Date 10/24/13

Superconductor
Length 01:47 Premiere Date 10/24/13

Swarming Robots
Length 01:31 Premiere Date 10/21/13

Sneak Peek: Making Stuff Wilder
Length 06:14 Premiere Date 10/21/13

How Batteries Work
Length 00:49 Premiere Date 10/19/13

Muon Detection
Length 01:52 Premiere Date 10/19/13

Muons
Length 01:25 Premiere Date 10/19/13

Plants White
Length 02:11 Premiere Date 10/19/13

DNA Patch
Length 01:19 Premiere Date 10/19/13

DNA Vaccine
Length 00:38 Premiere Date 10/19/13

Earthquake Test
Length 02:03 Premiere Date 10/19/13

David Drives
Length 01:27 Premiere Date 10/19/13

Virus Battery
Length 02:21 Premiere Date 10/19/13

Shelley
Length 02:07 Premiere Date 10/19/13

Robot Arm
Length 00:56 Premiere Date 10/19/13

Elephant Arm
Length 01:22 Premiere Date 10/19/13

FinGripper
Length 00:55 Premiere Date 10/19/13

Sail Wing
Length 01:02 Premiere Date 10/19/13

Hydrofoil
Length 01:01 Premiere Date 10/19/13

Chicken Feathers
Length 01:56 Premiere Date 10/19/13

KillaCycle
Length 00:48 Premiere Date 10/19/13

Pitcher Plant
Length 01:48 Premiere Date 10/17/13

SLIPS
Length 01:01 Premiere Date 10/17/13

Hagfish
Length 00:51 Premiere Date 10/17/13

Hagfish Defense
Length 01:36 Premiere Date 10/17/13

Slime Clothes
Length 01:00 Premiere Date 10/17/13

New York City One Year Later: Telecommunications
Length 03:14 Premiere Date 10/16/13

David's Race
Length 01:28 Premiere Date 10/15/13

Steffen's Plan
Length 01:59 Premiere Date 10/15/13

Traveling Salesman
Length 01:21 Premiere Date 10/15/13

Sneak Peek: Making Stuff Faster
Length 05:06 Premiere Date 10/15/13

Eye Robot
Length 01:51 Premiere Date 10/10/13

Corkscrew Robot
Length 00:32 Premiere Date 10/10/13

Slow Goldfish
Length 01:39 Premiere Date 10/10/13

Bee Toxin
Length 01:31 Premiere Date 10/10/13

Mild Traumatic Brain Injury
Length 03:36 Premiere Date 10/7/13

Invisibility Cloak
Length 01:22 Premiere Date 9/24/13

Shape Memory Alloys
Length 00:32 Premiere Date 9/8/13

Jellyfish
Length 00:38 Premiere Date 9/8/13

Bird Wings
Length 01:56 Premiere Date 9/8/13

Shrinking Chips
Length 01:06 Premiere Date 9/5/13

Pizza Transistor
Length 01:34 Premiere Date 9/5/13

Graphene
Length 01:11 Premiere Date 9/5/13

Solar Leaves
Length 00:53 Premiere Date 8/29/13

Battle Jacket
Length 01:49 Premiere Date 8/29/13

Oobleck
Length 00:40 Premiere Date 8/29/13

Magnetic Oobleck
Length 00:54 Premiere Date 8/29/13

Life-Saving Non-Newtonian Fluids
Length 01:43 Premiere Date 8/29/13

Silicon Transistors
Length 00:50 Premiere Date 8/29/13

Wheat Straw Plastic
Length 01:04 Premiere Date 8/29/13

Starling 8
Length 00:44 Premiere Date 7/15/13

sandy-raw-1-2
Length 00:04 Premiere Date 7/8/13

sandy-raw-5-1
Length 01:02 Premiere Date 7/8/13

Chemotherapy Goes Small
Length 01:17 Premiere Date 7/1/13

The Climate Wild Card
Length 03:02 Premiere Date 6/30/13

The Making of a Cloud Old
Length 03:10 Premiere Date 6/30/13

Why So Many Cloud Types?
Length 03:35 Premiere Date 6/30/13

Clouds and Weather
Length 03:21 Premiere Date 6/30/13

Severe Storms
Length 03:37 Premiere Date 6/30/13

Life on Europa?
Length 02:25 Premiere Date 6/9/13

CloudLab_Megastorm_03
Length 01:41 Premiere Date 5/29/13

CloudLab_Megastorm_04
Length 01:43 Premiere Date 5/29/13

CloudLab_Megastorm_05
Length 01:04 Premiere Date 5/29/13

CloudLab_Megastorm_06
Length 00:40 Premiere Date 5/29/13

CloudLab_Megastorm_07
Length 03:07 Premiere Date 5/29/13

CloudLab_Megastorm_01
Length 00:35 Premiere Date 5/28/13

CloudLab_Megastorm_02
Length 00:31 Premiere Date 5/28/13

What Made the 1918 Flu So Deadly?
Length 01:28 Premiere Date 5/13/13

How the 1918 Flu Infected People
Length 00:25 Premiere Date 5/13/13

Fertilizing the Amazon
Length 03:27 Premiere Date 4/21/13

Flu Probabilities
Length 01:53 Premiere Date 4/16/13

Rare Earth Elements
Length 04:17 Premiere Date 4/1/13

CHNOPS: Ingredients for Life
Length 02:36 Premiere Date 3/12/13

MODIS Sensor
Length 00:26 Premiere Date 2/28/13

Electromagnetic Spectrum
Length 00:44 Premiere Date 2/28/13

Solving the Storage Problem
Length 02:26 Premiere Date 10/25/12

Putting Energy to Use Old
Length 02:14 Premiere Date 10/8/12

The Fabric of the Cosmos: What Is Space?
Length 53:02 Premiere Date 11/1/11

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