Medellín, Colombia, reported roughly a 2°C reduction in average urban temperatures after establishing green corridors with about 2.5 million plants and 880,000 trees, although the figure comes from local-government data and should not be confused with the larger cooling recorded in some shaded locations.
True
After adding millions of plants and hundreds of thousands of trees, one city in Colombia has seen temperatures drop by around 2°C.
The city that went green to keep cool
Source: bbc.com
At a glance
Verified August 27, 2026Key Evidence
BBC Future reported that Medellín’s green corridors were associated with a roughly 2°C reduction across the city, citing local-government data.
Later reporting described the program as involving approximately 2.5 million plants and 880,000 trees.
Some reports refer to localized cooling of up to 5°C in shaded areas, which is a different and more geographically limited measure than the approximately 2°C citywide figure.
The reporting
What the Evidence Shows
The claim refers to Medellín’s green-corridor program. BBC Future reported in September 2023 that local-government data indicated a temperature reduction of about 2°C across the city after the corridors were created. Later accounts identify the planting effort as approximately 2.5 million plants and 880,000 trees.
The evidence therefore supports the claim’s central facts: the city is Medellín, the planting totals are in the millions and hundreds of thousands, and an approximately 2°C reduction was reported.bbc.combbc.comThe city that went green to keep cool
timesofindia.indiatimes.comtimesofindia.indiatimes.comHow a Colombian city cut temperatures by 2°C with 2.5 million plants and 880,000...+2 more
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