Honestly, capitalism.
The whole damn consume consume consume mindset. The idea that things are discarded instead of being repaired or properly recycled.
For typical middle-class people (like the ones probably reading this), usually the single worst thing they do is flying. It’s the only way to blow your personal carbon budget for the whole year in just a few hours.
That’s at the individual level.
I think when it comes to flying we should go back to balloons. We don’t need to reach far distances as quickly as we do, and we could drastically cut emissions if we grounded all the planes.
Having children
The last thing this world needs is more little consumers, especially living, or aspiring to, the western levels of consumption
I agree with this. We have more than enough people to deal with and don’t need any more people on the planet until the last batch expires.
Going vegan was the easiest for me. The Co2 impact is massive!
While I agree with the idea of going vegan for the environment, it is unfortunately an unattainable diet for many people on the planet. It is not cheap to be vegan, even though with the wealth of technology and advancement we have it should be.
There is no need to express opinions when we have good estimates for both your questions:
Sector by sector: where do global greenhouse gas emissions come from? -> https://ourworldindata.org/ghg-emissions-by-sector
individual solutions reviewed and assessed by Project Drawdown, including their relevant sector(s) and their impact on reducing heat-trapping gases -> https://drawdown.org/solutions/table-of-solutions
Both the links above are from a very interesting video on the topic that I suggest to take a look at. Also the whole channel is really interesting and well done -> https://www.youtube.com/watch?v=ReXaS4QausQ
I am aware their are numbers behind this. I am asking for peoples opinions on the matter.