- CO2 fertilization, confirmed by NASA, is the dominant driver of a global increase in leaf area equivalent to two times the size of the continental United States.
- Nitrogen deposited from burning fossil fuels has been identified as the second most important driver of planetary vegetation growth, surpassing climate and land use changes.
- A 2026 study in Ecography found that areas with higher nitrogen deposition experienced significantly faster rates of greening across nearly all climate zones and biome types.
- Historical warm periods like the Medieval Warm Era coincided with agricultural abundance and human prosperity, while cold spells like the Little Ice Age caused widespread crop failure.
- Rising CO2 levels boost crop yields substantially, with wheat increasing 20-30 percent, rice 15-32 percent, and soybeans up to 46 percent under elevated conditions.
A new global analysis published in the journal Ecography has identified an unexpected driver of the planet's expanding vegetation: nitrogen deposited from burning fossil fuels. The 2026 study examined changes in plant greenness across major ecosystems and found that nitrogen deposition showed one of the strongest statistical links to increased vegetative cover, surpassing even changes in climate and land use.
The findings challenge the dominant narrative that fossil fuel combustion serves only as an environmental threat. Researchers analyzed satellite data from 2001 to 2024 and found that areas with higher nitrogen deposition experienced significantly faster rates of greening. The effect held true across nearly all climate zones and biome types, from tropical forests to temperate grasslands.
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