We compare all greenhouse gases to carbon dioxide.
CO2e describes carbon dioxide and carbon dioxide equivalent gases. There are other greenhouse gases causing problems in our atmosphere such as methane. This is a “carbon dioxide equivalent” or CO2e.
CO2e100 describes how we compare carbon dioxide to other greenhouse gases (GHG) such as methane and take their effect over 100 years. This is because methane traps x100 as much heat as carbon dioxide when it is first released. Methane is removed from the atmosphere quite quickly but carbon dioxide stubbornly stays there. After twenty years methane traps x80 as much heat as carbon dioxide. After 100 years it traps x25.
CO2e100 means that you have a greenhouse gas that is not carbon dioxide which traps x25 more heat than carbon dioxide will do over 100 years.
Scientists are debating whether these values should now be used because climate change is accelerating and we should think about measuring the impact over just 20 years.
Most climate models measure the effect over 100 years and the Paris agreement used this framework as well.
Connect the work of governments with the many voluntary and collaborative actions taken by cities, regions, businesses and investors.
Egypt: Dr. Mahmoud Mohieldin
UK: Nigel Topping
Tackling Climate Anxiety
Race to Zero is the UN-backed global campaign rallying non-state actors – including companies, cities, regions, financial and educational institutions – to take rigorous and immediate action to halve global emissions by 2030 and deliver a healthier, fairer zero carbon world in time.
The Race to Resilience is the UN-backed global campaign to catalyse a step-change in global ambition for climate resilience, putting people and nature first in pursuit of a resilient world where we don’t just survive climate shocks and stresses, but thrive in spite of them.