GHGs (greenhouse gases) (such as CO2) are the gases that cause climate change. This is a pie chart of where they come from.
Most of the world's emissions are affected by either...
How much new "stuff" gets made. [?]Pie chart sections: "Industry", "Energy Use In Industry", and part of "Fugitive Emissions In Energy Production" (as natural gas is used in the industries).
How much people drive/fly. [?]Two thirds of the "Transport" section of the pie chart (because the other third is for transporting goods; the ratio isn't found in this pie chart, but it's found in another pie chart).
Heating & coolinghomes and other buildings. [?]Most of the "Energy Use In Buildings" section is heating & cooling (not lights or computers etc). The pie chart doesn't specify this, but another pie chart does. Heating & cooling also contribute to "Fugitive Emissions In Energy Production", because natural gas is often used in heating and in generating the electricity that powers air conditioners.
Food production. [?]Most of the "Agriculture, Forestry & Land Use" pie chart section goes towards producing food. Also note: This section affects more than just climate change, it also affects most of habitat loss.
This provides some perspective on the most significant actions to take.
Decarbonize energy - but this requires major tech innovations that might not come soon enough. It becomes a lot easier if energy consumption is lower - so in any case, the other actions on the list are just as important as ever.
