"Just build nuclear" - As per the post itself, we need to build 3 nuclear plants every day until 2050 to replace the entire grid with nuclear. Yeah not realistic.
Carbon capture [0]
1. We take 5 billion cubic meters of Oil out of the ground
2. We emit 30 billion tons of CO2
3. We can only capture from big sources like power plants and industrial sources - Maybe about 40 % of Co2 can be captured
4. Half of the capturable CO2 is about 6 billion tons of gas
5. We will have to liquefy it so it has to go into the ground.
6. We have to shove 12 billion cubic meters of Co2 into the ground every year to sequester only half of the capturable CO2 however the scale of this is greater than the entire Oil industry that was created over 100 years and cost trillions in capital.
7. After this you're still only capturing a fraction of the carbon. You'll have to pay heavy taxes on everything you buy.
8. Who is going to live next to these billions of tons of C02 in the ground ? This will leak and kill people.
Electric cars [1]
1. The global vehicle fleet is estimated at 1.4 billion vehicles travelling 28 trillion kilometers
2. Powering this is estimated to require an *additional* 17k Terawatt hours of carbon free power generation. The current global generation of electricity is 26k Terawatt hours.
Phasing out fossil fuels from power generation entirely
3. The author estimates that we need to build 165k new power plants that are a mix of solar, wind, hydro and nuclear. This while most of the worlds existing infrastructure is crumbling.
4. We need 200k storage stations that can store 100 MWh to act as backup for solar / wind. This will need 90 million tonnes of batteries.
5. If you want to replace the Gas used for heating as well and go completely zero fossil fuel the estimate becomes - 6 million storage stations and 2 billion tonnes of batteries.
6. The entire known reserves of Nickel, Lithium, Cobalt are not enough to make these many batteries. We need another 7 Australian Lithium deposits.
India and China continue to rapidly increase their emissions. Poorer nations cannot stop they are too poor to even begin.
[0] - https://www.youtube.com/watch?v=8SIjlZQf28I - Vaclav Smil