The amount of CO2e emitted since 1850 is around 2200 Gt (Masson-Delmotte et al., 2018), representing an average of 182 Gt per 0.1oC rise, or 17 Gt CO2 per 1 ppm increase in the atmospheric concentration of CO2.

Another 550-600 Gt CO2e, equivalent to 10 years of emissions at current rates, will reach the aspirational limit of 1.5oC.

How climate change affects life on earth https://perma.cc/MDY7-SB4G

The oceans also regulate the global climate; they mediate temperature and drive the weather, determining rainfall, droughts, and floods. They are also the world’s largest store of carbon, where an estimated 83% of the global carbon cycle is circulated through marine waters https://perma.cc/W726-YMPX

Deforestation, which decreases rates of photosynthesis and thus how much carbon dioxide is captured by the growth of plants https://perma.cc/D6AC-8EZJ
Thus, deforestation typically releases carbon dioxide, unless all the material is used for construction, or for paper products.
https://www.tgoop.com/WWFFacts/11

Which emits more carbon dioxide: volcanoes or human activities? https://perma.cc/8YGK-LUJ4

Human activities release far more carbon dioxide than volcanoes do https://perma.cc/TN7N-2JNE

CO2 emissions from EU territorial energy use: -2.8% https://perma.cc/VP4C-BBY3

Global Carbon Emissions https://perma.cc/69JT-DCN8