During the last years, not only have the levels of **[carbon dioxide](https://noticiasambientales.com/ciencia/estudio-de-tecnologia-satelital-proporciona-una-nueva-estimacion-del-carbono-contenido-en-los-bosques-globales/)** (CO2) increased, but also the average size of trees in the **Amazon** has increased by 3.2% each decade, according to a new study published in **[*Nature Plants*](https://www.nature.com/articles/s41477-025-02097-4)**.
According to the research involving more than **60 universities from South America, the United Kingdom, and other countries**, such as the Universities of Birmingham, Bristol, and Leeds, the increase in average size was sustained for at least 30 years.
To make this discovery, the team of nearly 100 researchers monitored the size of trees in 188 permanent plots. The finding represents good news for the **environment**, as these trees continued to grow despite the threats.
This growth coincides with the benefit of **fertilization** derived from the increase in atmospheric **carbon dioxide**. This would mean that carbon dioxide stimulates persistent growth, once again demonstrating the resilience of **nature**.
## The growth as a sign of change
While the increase in carbon stored in the **Amazonian tropical forests** is not new to experts, what did surprise them is that the trees increased in size during the same period, showing that these spaces are changing.
This study is the first of its kind to measure how the increase in CO2 can modify the size structure of these trees, with the result revealing that the **Amazonian forests** managed to dominate the competition for resources.
## The green giants of the Amazon
The **Amazonian tropical forests** harbor some of the tallest and most majestic trees on the planet. These giants can exceed 60 meters in height, equivalent to a building of more than 20 floors. Their robust structure allows them to compete for sunlight in a dense and competitive **ecosystem**.
Among the most imposing species are the Brazil nut tree, the ceiba, and the shihuahuaco, trees that not only reach great heights but also play vital roles in **ecological balance**. Their canopies are part of the upper canopy, a layer that regulates the temperature and humidity of the forest.
The tree diversity of the **[Amazon](https://noticiasambientales.com/medio-ambiente/plasticos-en-la-amazonia-un-estudio-pone-en-evidencia-la-amenaza-silenciosa-que-afecta-ecosistemas-y-comunidades/)** is so vast that each hectare can contain hundreds of different species. These trees, in addition to their height, have deep roots and large diameter trunks that store carbon and support a vital network of life for the **global climate** and the **biodiversity of the planet**.
