Bill Hare on Twitter: "Getting back below 400 ppm #CO2 by 2080s can be done but only if we get on #1o5C path under #ParisAgreement https://t.co/qfnSgaJyYM" / Twitter
Carbon Dioxide Hits 400 ppm — Does It Matter? | Discover Magazine
CO2 als Lüftungsindikator » raumluft.org » Mensch - Umwelt - Gesundheit
What Passing a Key CO2 Mark Means to Climate Scientists | Climate Central
Climate Milestone: Earth's CO2 Level Nears 400 ppm
400 ppm - Schritt über die Schwelle | deutschlandfunk.de
What does 400 ppm look like? — Carbon Visuals
Climate Fresk - Card 'CO2-Konzentration (ppm)'
Welt der Physik: Kohlendioxidgehalt der Erdatmosphäre erreicht 400 ppm
How the World Passed a Carbon Threshold and Why It Matters - Yale E360
South Pole is last place on Earth to pass global warming milestone - 400 ppm - Conservation in a Changing Climate
How the World Passed a Carbon Threshold and Why It Matters - Yale E360
Kohlendioxid-Konzentration – Klimawandel
February carbon dioxide levels average 400ppm for first time – ECOS
Climate Milestone: Earth's CO2 Level Passes 400 ppm
factory - Magazin für nachhaltiges Wirtschaften | News | 2015 erstmals mehr als 400 ppm CO2 in der Atmosphäre
400 ppm and counting – Shell Climate Change
2015 Begins With CO2 Above 400 PPM Mark | Climate Central
400 PPM. So what. - The Energy Miser
No going back: “Say goodbye to measurements below 400ppm” - Oil Change International
Globale CO2-Konzentration erreicht 400 ppm - energiezukunft
The world passes 400ppm carbon dioxide threshold. Permanently | Climate crisis | The Guardian
.jpg "Carbon dioxide crosses 400 ppm mark")
Carbon dioxide crosses 400 ppm mark
2013 State of the Climate: Carbon dioxide tops 400 ppm | NOAA Climate.gov
Arctic News: Monthly CO₂ not under 400 ppm in 2016
What does 400 ppm look like? — Carbon Visuals
For first time, Earth's single-day CO2 tops 400 ppm – Climate Change: Vital Signs of the Planet
