News Hero
Back to Discover
Channel
Veritasium July 7, 2026

The Secret to Plants' Cooling Power

When we look at a plant, it seems like it's just sitting there, but if we use a thermal camera, we can see something strange. The plant is actually colder than the air around it, even though it's sitting in the hot sun. This is because of the way plants use energy from the sun. They use most of it to make food through photosynthesis, but some of it is used to make water evaporate.

As soon as a plant opens its tiny pores called stomata to pull carbon dioxide out of the air, the wet inside of the leaf meets the hot dry air, and water evaporates. This process takes a lot of energy, around 2,400 J per milliliter, which is pulled straight out of the leaf. As a result, up to 50% of the sunlight a plant absorbs goes into evaporating water instead of heating it up.

This means that plants are not just sitting there; they're actually helping to keep the air cool. And that's good for the environment. Just like green spaces pulling heat out of a city, Anker built their Anker Prime Charger with a unique thermal silicone that helps carry heat away.

Logo

Analyzing...
An error occurred. Please try again.

Video Summary

English Comprehension Quiz

Test your understanding of the story by answering these 10 questions.