Frankly, it doesn't matter what Germany or other European nations do - their carbon footprint has dramatically decreased.
The issue is everyone else [0]. China (12 GT), the US (5 GT), and India (3 GT) alone represent over half of all global carbon emissions. The EU and UK's combined carbon emissions are half of Asia (excluding China and India) emissions.
Countries like India and Vietnam are expected to see GDP growth in the 6-8% range for the next decade, and both are doubling down on coal [1][2] and other carbon heavy fuels, so emissions are only going to grow further. Any marginal decrease in carbon emissions at this point is too little too late given that much of Asia and South America is expected to see carbon emission grow in the 3-8% range.
[0] - https://ourworldindata.org/grapher/annual-co2-emissions-per-...
[1] - https://www.bloomberg.com/news/articles/2025-12-05/india-mul...
[2] - https://www.reuters.com/business/energy/vietnam-looks-more-c...