Thomas Arend<p>The CO₂ levels at Mauna Loa for March 2025 are available. The CO₂ concentration rose from 425.38 ppm (March 2024) to 428.15 ppm. This represents an increase of 2.77 ppm within a year. March 2025 was the first month in which daily values above 430 ppm were measured. In April, the last three days were above 430 ppm. On average, April could exceed 429 ppm. If that's the case, there's a good chance of exceeding 430 ppm in May.</p><p><a href="https://nrw.social/tags/co2" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>co2</span></a> <a href="https://nrw.social/tags/climate" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>climate</span></a> <a href="https://nrw.social/tags/climatechange" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>climatechange</span></a> <a href="https://nrw.social/tags/klima" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>klima</span></a> <a href="https://nrw.social/tags/klimakrise" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>klimakrise</span></a></p>