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Planting trees is a great way to improve the environment and make the planet greener. Trees are often referred to as the lungs of the earth， and rightly so. They play a vital role in purifying the air we breathe by removing pollutants and generating oxygen. A single tree can remove up to 26 pounds of carbon dioxide from the atmosphere every year， and it releases oxygen that we humans depend on for survival.

The process of photosynthesis that trees undergo is what allows them to purify the air. During this process， they absorb carbon dioxide and other gases from the atmosphere while releasing oxygen back into the environment. Additionally， the leaves of the trees act as filters that help in removing harmful pollutants from the air.

Planting trees in urban areas has become increasingly significant over the years mainly due to the increased level of pollution that is present in these places. The pollutants such as fine particulate matter， ozone， and nitrogen dioxide can cause health problems， including respiratory diseases. By planting trees in these areas， we can help to purify the air and create a healthier environment for everyone.

Trees also have a tremendous impact on global warming. As they absorb carbon dioxide， trees can help control its excess in the atmosphere， the primary cause of global warming. They also help regulate temperature and reduce energy consumption by providing shade and acting as windbreakers.

In conclusion， planting trees has a vast array of environmental benefits， including improving air quality by removing pollutants and releasing oxygen. By planting trees in urban areas and other places， we can help purify the air and create a healthier environment for ourselves and future generations. It is essential to encourage tree planting at all levels of society， and governments need to play their part by creating policies that promote afforestation.