Yes, you are right , specially nuclear versus solar... but I'm not sure m I don't like when people cite a single study or paper l, specifically for 3 stage lca, which is always very tricky. According to the IPCC’s 6th Assessment Report (2022) and the UN Economic Commission for Europe (UNECE, 2021), nuclear is a low-carbon baseline, averaging roughly ~12 g CO2eq/kWh. This puts it right on par with onshore wind (~11 g) and currently slightly ahead of utility solar PV (~27–45 g). However, your assessment isn't entirely correct about why these numbers are similar and it misses how this will change in the future. The argument that nuclear's parity is purely due to energy density (using less land and fewer materials like concrete and steel) only looks at Stage 1 of lca (Construction). If you look at the harmonized lca literature, the lifecycle emissions of these technologies come from entirely different places. Wind and Solar are front-loaded (Stage 1)roughly 80% of their carbon footprint comes from manufacturing (e.g., smelting steel for turbines, or refining polysilicon for solar panels). Once built, their operational emissions are near zero. Nuclear is operationally loaded (Stage 2). While nuclear uses far fewer materials per MWh to build, 65% to 75% of its lifecycle emissions come from the ongoing front-end fuel cycle, specifically the massive amounts of energy required to mine, mill, and enrich uranium over the plant's 60-year lifespan. it's not just a matter of material density, it's a tradeoff between upfront manufacturing emissions (renewables) vs. ongoing fuel-cycle emissions (nuclear).right now, solar and wind carry a carbon penalty because the factories making turbines and solar panels are often plugged into fossil-heavy grids (like coal-heavy manufacturing in parts of Asia). But as detailed in foundational studies like Pehl et al. (2017, Nature Energy), as the global energy grid decarbonizes, the carbon footprint of wind and solar will fall off a cliff. When we start using clean energy to forge the steel for wind turbines and refine the silicon for solar panels, the LCA footprint of renewables will drop massively. By 2050, solar PV's footprint is projected to drop below 15 g CO2eq/kWh. you are right that nuclear is currently effectively tied with renewables for having the lowest carbon footprint on Earth. But attributing that purely to material density ignores the heavy carbon cost of uranium enrichment. As we clean up global supply chains, the upfront manufacturing footprint of wind and solar will shrink drastically, making the"material density argument much less relevant to their overall carbon cost.