When Will the Earth's Last Green Day Arrive?

A new study modeling the Earth's future has revealed a striking time frame for our planet's "last green day". According to researchers, the Earth may experience its last green day in about 1.87 billion years due to the Sun's increasing heat. This research was conducted using new simulations developed by planetary scientists. Calculations using three-dimensional climate models suggest that the last plant species on Earth may disappear in about 1.87 billion years under current conditions. Astrobiologist Jacob Haqq-Misra and climate scientist Eric Wolf modeled the Earth's climate evolution over the next approximately 2 billion years. During this period, the Sun's brightness is expected to increase by about 20%, drastically changing the planet's living conditions. The researchers evaluated two different scenarios for the Earth's carbon cycle. In the first scenario, it was assumed that carbon is removed from the atmosphere more quickly. In this case, although temperatures remain relatively balanced, the amount of carbon dioxide in the atmosphere drops to levels at which plants can no longer perform photosynthesis. In the second scenario, atmospheric carbon dioxide is preserved for a longer period, while the planet's average temperature rises to approximately 65 degrees. Due to this extreme heat, terrestrial plants are predicted to completely disappear in about 1.87 billion years. Scientists note that the predicted period for the end of plant life largely coincides with the time frame in which the Earth's oceans are expected to evaporate and disappear. The study emphasizes that the future of plants, which make up about 80% of the planet's total biomass, is directly linked to atmospheric carbon dioxide levels and global temperature changes.