Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Newsletters
  • Advertising
  • Superior Accuracy™
President Trump visits flood-ravaged Kerrville as search continues Chevron right
New flash flood threat looms in Texas as heat scorches recovery zone. Chevron right

Columbus, OH

78°F
Location Chevron down
Location News Videos
Use Current Location
Recent

Columbus

Ohio

78°
No results found.
Try searching for a city, zip code or point of interest.
settings
Columbus, OH Weather
Today WinterCast Local {stormName} Tracker Hourly Daily Radar MinuteCast Monthly Air Quality Health & Activities

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

News & Features

Astronomy

Business

Climate

Health

Recreation

Sports

Travel

For Business

Warnings

Data Suite

Newsletters

Advertising

Superior Accuracy™

Video

Winter Center

AccuWeather Early Hurricane Center Top Stories Trending Today Astronomy Heat Climate Health Recreation In Memoriam Case Studies Blogs & Webinars

News / Weather News

Highest CO2 levels in human history detected

Published Jun 4, 2019 7:39 PM EDT | Updated Jun 4, 2019 7:39 PM EDT

Copied

The Mauna Loa Observatory reports that CO2 is now at 415.26 parts per million. That is the first time the gas has reached this high of a level in the planet's atmosphere. Not just in recorded history or just since the invention of agriculture 10,000 years ago, but from before modern humans existed millions of years ago. The news comes shortly after it was revealed human activity is putting over 1 million plants and animals at risk of extinction. The increase in carbon emissions is also associated with climate change, which has been linked to recent extreme cases of weather in the U.S. such as prolonged hurricanes. By 2090, damages caused by climate change could cost America half a trillion dollars annually.

The highest carbon dioxide concentration levels in human history have been recorded at Mauna Loa Observatory in Hawaii.

During the month of May, CO2 levels averaged 414.8 parts per million -- levels not present on Earth in millions of years.

CO2 levels typically peak on Mauna Loa around this time of year, but carbon dioxide levels have increased consistently during the past few decades. This year's peak was 3.5 parts per million higher than last year's apex of 411.3 parts per million.

Climate scientists agree that increases in atmospheric CO2, the result of the burning of oil, gas and other fossil fuels, is to blame for rising global temperatures.

hawaii CO2

Carbon dioxide levels reached a new high during May 2019, according to measurements recorded at NOAA's Mauna Loa Observatory in Hawaii. (Photo by EPA-EFE/RYAN TONG)

"Many proposals have been made to mitigate global warming, but without a rapid decrease of CO2 emissions from fossil fuels they are pretty much futile," Pieter Tans, senior scientist with NOAA's global monitoring division, told USA Today.

Carbon dioxide is the most abundant greenhouse gas, but the levels of other planet-warming gases like methane are also rising. NOAA tracks many of them.

Earlier this year, NOAA announced that the Annual Greenhouse Gas Index -- a measure of greenhouse gas emissions and their impact on the the atmosphere's heat-trapping capacity -- rose to a value of 1.43.

"Greenhouse gas pollution traps heat in the atmosphere, which has consequences," James Butler, director of NOAA's Global Monitoring Division, said in a news release. "There's no getting around it -- burning fossil fuels is changing the course of our planet's future. How society deals with that will be a major challenge in coming decades."

The agency also announced that CO2 levels increased at a record rate in 2018, echoing the findings of other studies that showed carbon emissions increased around the world after a few years of minimal growth.

Report a Typo

Weather News

Weather News

President Trump visits flood-ravaged Kerrville as search continues

Jul. 11, 2025
Severe Weather

Rounds of severe storms to rattle, drench central US

Jul. 11, 2025
Severe Weather

Is the US seeing worse flooding this summer? Here’s what’s happening

Jul. 11, 2025
video

Before-and-after pictures show devastation caused by Texas floods

Jul. 9, 2025
Severe Weather

Severe weather to rumble in the central US through the holiday weekend

Jul. 6, 2025
Weather News

Record sargassum seaweed piles up on Caribbean islands, Gulf

Jul. 2, 2025
Weather News

Alabama teen in ICU after lightning strike hits boat, causing burns an...

Jul. 2, 2025
Show more Show less Chevron down

Topics

AccuWeather Early

Hurricane Center

Top Stories

Trending Today

Astronomy

Heat

Climate

Health

Recreation

In Memoriam

Case Studies

Blogs & Webinars

Top Stories

Weather Forecasts

Thunderstorms to fuel flash flooding threat in Texas

11 hours ago

Weather News

President Trump visits flood-ravaged Kerrville as search continues

9 hours ago

Weather News

Camp Mystic’s owner warned of floods for decades

20 hours ago

AccuWeather Ready

Is your house in a flood zone? This map has the answer

14 hours ago

Severe Weather

Is the US seeing worse flooding this summer? Here’s what’s happening

18 hours ago

More Stories

Featured Stories

Health

How can families handle new anxieties around summer camp?

14 hours ago

Weather News

Viral pygmy hippo Moo Deng celebrates her first birthday

18 hours ago

Weather News

Orcas are bringing humans gifts of food – but why?

18 hours ago

Business

Samsung is looking into more AI devices potentially including earrings...

18 hours ago

Weather News

The US has a plan to breed millions of flies and drop them from planes

1 day ago

AccuWeather Weather News Highest CO2 levels in human history detected
Company
Proven Superior Accuracy About AccuWeather Digital Advertising Careers Press Contact Us
Products & Services
For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect RealFeel® and RealFeel Shade™ Personal Weather Stations
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center
Company
Proven Superior Accuracy About AccuWeather Digital Advertising Careers Press Contact Us
Products & Services
For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect RealFeel® and RealFeel Shade™ Personal Weather Stations
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center
© 2025 AccuWeather, Inc. "AccuWeather" and sun design are registered trademarks of AccuWeather, Inc. All Rights Reserved.
Terms of Use | Privacy Policy | Cookie Policy | About Your Privacy Do Not Sell or Share My Personal Information

...

...

...