The world has officially hit a new level of global warming, confirmed by the World Meteorological Organization, which states that from 2015 to 2025, we’ve lived through the hottest decade on record since 1850. Things are heating up fast, and we’re getting dangerously close to limits set by international treaties, and the new report makes it clear that scientists agree there’s no time to waste. We need to act now if we want to avoid permanent damage to the planet.

What Key Temperature Records Define the Hottest Decade?

• 2015-2025: (Warmest period recorded) According to the World Meteorological Organization, the past 11 years have been the hottest since 1850 because of the steady rise in temperature due to greenhouse gas emissions.
• 2024: (Hottest year ever recorded) During this year, global temperatures were recorded at 1.55°C above pre-industrial times, which is above the critical limit set in the Paris Agreement.
• 2025: (Among the top three hottest years) During this year, temperatures were recorded at 1.43°C above pre-industrial times, placing it at number two or three in the list of hottest years.
• Long-term warming trend: The earth has already risen by 1.2°C since the late 19th century, according to the Intergovernmental Panel on Climate Change.
• Carbon dioxide concentration rise: CO2 concentration in the atmosphere crossed 420 ppm between 2023 and 2025, which is the highest in at least 2 million years.

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How Are Climate Systems and Natural Environments Being Affected?

• Severe loss in glaciers: The loss in glacier mass at key monitoring sites is one of the top five worst on record. There was a significant loss in Iceland and North America.
• Ocean heat records: The oceans have absorbed more than 90% of the excess heat. The ocean temperatures have been at a record high in 2023-2025.
• Intensification of extreme weather conditions: Increased temperature levels have caused severe cyclones, floods, droughts, and heatwaves.
• Sea level rise acceleration: The rate at which the sea level is rising, about 3.7 mm per year, is almost double the rate at which it was rising in the 20th century.

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Why Is the World Nearing the 1.5°C Climate Threshold?

The above-mentioned studies demonstrate one of the closest moments in time when the world will exceed 1.5 °C in warming. Antonio Guterres has publicly proclaimed that the current situation constitutes a “climate emergency” with “all of the primary climate indicators glowing red”, and with continued scientific evidence showing that exceeding a warming of 1.5 °C greatly increases the probability of extreme heat events, loss of biodiversity, and permanent damage to several ecosystems (eg. Coral reefs, polar ice caps).

The recently confirmed hottest decade on record emphasizes not only the need for urgent global action to confront climate change, but also that the world’s governments, respective industries, and individuals must speed up the rate of reducing their respective emissions and transition to sustainable forms of energy.

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