Nature-based and REDD+ carbon credit projects provide an extremely effective solution to harness the power of natural ecosystems in the fight against climate change and catastrophic biodiversity loss. They offer the double benefit of carbon sequestration and biodiversity conservation but require rigorous implementation and monitoring to ensure their effectiveness. This is why bench demands the highest standards when selecting the best projects to maximize your impact, and complete transparency to show you how. 

Photosynthesis is the most effective way to sequester CO; nothing is remotely close to nature at accomplishing this. It has evolved over 3.4 to 3.5 billion years. The terrestrial sink (mostly forests) has been sequestering 11.4 GtCO2 per year, as much as 29 percent of annual anthropogenic CO2 emissions in 2011–2020.

Changes in forest cover and characteristics also influence climate in other ways. For example, they affect albedo (the extent to which solar radiation and, therefore, heat is reflected back to the atmosphere), the emission of water vapor into the atmosphere (through evapotranspiration), the height above the Earth’s surface to which heat and water vapor are forced upward (by the “roughness” of tree canopies), and the extent to which dust and smoke particles, pollen and microbes enter the atmosphere as aerosols (with their effects on temperature). Trees also emit other chemicals that affect climate, such as biogenic volatile organic compounds.

The adverse local and regional effects of forest and tree loss on temperature and rainfall can be substantial, especially in the tropics. Recent modeling also indicates that deforestation of remaining humid rainforests in Africa would likely dramatically affect rainfed agriculture across the continent, particularly maize-based cropping systems north of the equator. The local to regional impacts of forests on climate can be important for reducing urban heat (primarily through transpiration, shading, and albedo); for example, trees in urban settings have been shown to reduce land surface temperatures in Central Europe in summer and during heat extremes by as much as 12 °C. 

Nature vs. tree planting

Tree planting can have unintended negative consequences, particularly when compared to the preservation of existing forests or careful reforestation efforts. Here are some of the reasons why:

Biodiversity Loss:

• Planting a single tree species in monoculture plantations can reduce biodiversity, as these plantations do not provide the same habitat complexity as natural forests.
• Monocultures are more susceptible to diseases and pests, leading to significant losses and impacting surrounding ecosystems.

Disruption of Local Ecosystems:

• Introducing non-native tree species can disrupt local ecosystems, outcompete native species, and reduce local biodiversity.
• Planting trees in ecosystems that naturally have few trees, such as grasslands or peatlands, can alter the habitat and negatively affect the species adapted to those environments.

Carbon Sequestration:

• Young plantations sequester less carbon than mature forests. Planted forests take decades or even centuries to store the amount of carbon that old-growth forests can.
• Planting trees in some regions, particularly in high-latitude ecosystems, can result in a net warming effect due to changes in albedo (the reflectivity of the Earth’s surface).

Water Use and Availability:

• Trees require significant amounts of water, which can lead to decreased water availability for other ecosystems, agriculture, and human needs.
• In dry regions, large-scale tree planting can exacerbate water scarcity.

Cultural and Social Impact:

• Tree planting initiatives can sometimes ignore the rights and needs of local and indigenous communities, leading to social conflict and even displacement.
• The focus on tree planting can sometimes divert attention and resources away from more effective conservation actions, such as protecting existing forests, which are often more rich in biodiversity and carbon.

Effective Reforestation:

• Effective reforestation involves restoring native forests with diverse species and is usually more beneficial than simple tree planting. It aims to replicate the structure and diversity of natural forests, which supports resilience and ecosystem services.

Preservation:

• Preserving existing forests, especially old-growth forests, is crucial because they are already stable ecosystems that support complex networks of life, store large amounts of carbon, and have adapted to their local environments over centuries or millennia.

In summary, while planting trees has its place in global efforts to combat climate change and environmental degradation, it must be done thoughtfully and strategically. Preserving existing forests and careful, ecologically sound reforestation are generally more effective for maintaining biodiversity, supporting ecosystems, and storing carbon.

Here are a few potential impacts of South American deforestation on North American weather:

Disruption of the Rainfall Patterns:

• The Amazon rainforest contributes to the formation of rain clouds that can affect precipitation patterns far beyond the region. Deforestation reduces evapotranspiration—the process by which water is transferred from the land to the atmosphere by evaporation from the soil and other surfaces and by transpiration from plants. This can lead to changes in rainfall patterns, potentially decreasing precipitation in areas downwind, including parts of North America.

Altered Atmospheric Circulation:

• Large-scale deforestation can lead to changes in atmospheric circulation patterns. The Amazon, through its vast forest cover, helps drive the Hadley cell, a pattern of atmospheric circulation that influences weather in the tropics and subtropics. Disruption of these patterns can modify the jet stream and may lead to changes in weather patterns in North America, such as alterations in the frequency and intensity of storms or droughts.

Impact on Temperature:

• Deforestation can lead to higher temperatures in the Amazon region due to the loss of forest cover and its cooling effect. These temperature changes can influence atmospheric circulation patterns, potentially leading to shifts in the weather of far-off places, including North America, and the intensity and frequency of heatwaves, storms, and cold snaps in North America.

Ocean Currents and Sea Surface Temperatures:

• Changes in the climate due to deforestation can influence ocean currents and sea surface temperatures. Since these are critical drivers of weather systems, any changes can have cascading effects on weather patterns, potentially affecting phenomena like the El Niño-Southern Oscillation, which strongly influences the climate in various parts of North America.

It’s important to note that these impacts are complex and interrelated and can vary significantly. However, climate models and observational studies consistently show that deforestation has the potential to cause significant alterations in global weather patterns.

So, by embracing the immense power of nature, we can help mitigate climate change while preserving our biodiversity.