Paris Climate Change Accord

"The Paris Agreement (French: Accord de Paris)[3] is an agreement within the United Nations Framework Convention on Climate Change (UNFCCC), dealing with greenhouse-gas-emissions mitigation, adaptation, and finance, signed in 2016. The agreement's language was negotiated by representatives of 196 state parties at the 21st Conference of the Parties of the UNFCCC in Le Bourget, near Paris, France, and adopted by consensus on 12 December 2015.[4][5] As of November 2019, all UNFCCC members have signed the agreement, 187 have become party to it,[1] and the only significant emitters which are not parties are Iran and Turkey."



Historical record of CO2 atmospheric concentration 1700 to 2020 from NOAA's Earth System Research Lab



275 ppm in 1700, 290 ppm in 1800, around the 360 ppm mark in 1990, latest reading is 413 ppm this week. Thick black line represents actual measurements from the Mauna Loa CO2 monitoring station. The oldest CO2 monitoring station in the world, starting in 1958

All commitments in the Paris accord are set to reductions based on 1990 levels.

That is, after the atmospheric CO2 concentration had already climbed 130% from 275ppm in 1700 to 360ppm in 1990

 

So, not all CO2 released into the atmosphere every year is because of humans. Scientists can work out how much of it is from humans how much is not, nowadays anyway

Tonnes of CO2 released into the atmosphere does not immediately translate into atmospheric concentrations in parts per million

So the next step is to work out what your country's emissions target is (remember all targets in the Paris accord are set to reducing as a percentage the output that occured in 1990) most emmision targets are around the 20% mark, reducing to 80% of 1990 output levels by 2021 through to 2030

What the actual human caused output was in tonnes in years like 1700, 1890....to see just how useless comparing things to 1990 levels is


This graph estimates world CO2 emissions from fossil fuels only, which is not all sources of human related CO2 emissions


Global Greenhouse Gas Emissions Data | US EPA



600 million metric tons in 1900
6 Billion metric tons in 1990


Even if reducing those 1990 levels by 20% was achievable...to 4.8 billion tonnes per year

It's still a 700% increase instead of a 900% increase compared to 1900 levels