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Source: National Oceanic and Atmospheric Administration’s Global Monitoring Laboratory The chart shows monthly numbers of carbon dioxide molecules per million molecules of dry air. Because of seasonal differences, levels are higher in May than in August. Carbon dioxide acts like Earth’s thermostat: The more of it in...

In our new Synergy column, Cosmos writers explore how we’re dealing with the urgent issues of climate change. According to the World Meteorological Organisation, 2023 was 1.45°C hotter than preindustrial levels. It’s a number that’s been plastered across headlines for a week – but what does it actually mean? When studying science, I was trained […]