Today, trees absorb 30% of global emissions every year. And when we burn them or cut them down, all of that pollution gets released into the air. A recent study estimated that from 2010 and 2050, global forest loss will result in 3.5 to 4.2 billion metric tons of greenhouse gasses entering the atmosphere each year. Even small amounts of air pollution contribute to a plethora of health issues that affect society unevenly.
2023 was the hottest year on record. 2024 looks set to be even hotter.
Trees, though, cool the Earth by blocking sunlight and providing shade — air temperature under trees can be 25°F cooler than surrounding air. They can also reduce energy use for cooling and heating. The Department of Energy states that planting trees around your house can reduce solar heat gain from windows and roofs, thus reducing costs for air conditioning.
A process where water is drawn up through the soil by the roots and evaporates from the leaves. The surrounding air cools as the water transforms to vapor. One tree can transpire 11,000 gallons of water into the atmosphere per year.To combat the heating effects of concrete in cities, studies suggest we need at least 40 percent canopy coverage. With over half of the world’s population living in cities — notoriously hotter because of concrete, poorer air quality, limited shade and green space, buildings — we must try all we can to beat the heat.
Mature trees protect communities against flash floods and landslides by stabilizing soil and absorbing water — between 1,500 and 2,000 liters of water per year. On the other root (hah), a lack of trees can lead to increased runoff and floods. Tree roots also filter harmful chemicals and pollutants from storm runoff that ends up in lakes, streams and rivers.
If we continue to destroy the environment, we’ll be living in very stressful conditions: droughts, massive storms, pandemics, floods. But trees have a double effect on society: fighting climate change while relieving stress.
(1) Trees purify our air and combat climate change
(2) Trees provide housing to millions of species that protect us from disease
(3) Trees cool our streets and cities
(4) Trees protect against floods and water pollution
(5) Trees ease the mind during stressful times
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