Greenhouse-gas levels set records in 2025

The World Meteorological Organization says greenhouse-gas concentrations reached record highs in 2025. The gases named are carbon dioxide, methane, and nitrous oxide. Carbon dioxide averaged 426.8 parts per million. The year of the measurements is 2025.

All three gases are described as having hit record highs. The only parts-per-million figure given is for carbon dioxide. That figure is 426.8. The organization is the World Meteorological Organization.

The finding is global. It covers concentrations, not a single city reading. Methane and nitrous oxide are included with carbon dioxide. The record language applies to the 2025 levels.

426.8 parts per million is the carbon dioxide average stated. No separate methane number was included in the summary of the release. The summary does name methane and nitrous oxide as record highs. The year is 2025.

The organization reporting the finding is the World Meteorological Organization. The subject is atmospheric concentration of the three gases. Carbon dioxide is the gas with the stated average. Methane and nitrous oxide are included as record highs without a separate number in the summary.

The recorded environmental finding is a set of record concentrations. The gases are carbon dioxide, methane, and nitrous oxide. The carbon dioxide average is 426.8 parts per million. The year is 2025.