planting trees can contribute to reducing global warming


Climate change has been a pressing issue since the late 20th century when the world recognized the gravity of the situation (Fig. 1). The United Nations Framework Convention on Climate Change (UNFCCC) was introduced in the early '90s, followed by the Kyoto Protocol in 1997, and later the Paris Agreement in năm ngoái. The Paris Agreement aimed to tát limit the global temperature increase to tát 2 °C by the over of the century while pursuing efforts to tát cap it at 1.5 °C. Despite global efforts to tát combat climate change, evidence suggests that current and future emission reduction commitments are insufficient to tát meet the Paris Agreement targets (Fawzy et al. 2020). While tree planting is a popular solution, it is crucial to tát enhance and secure the permanence of the carbon stored in trees and soils. Indeed, if not managed effectively, tree planting could have a negative impact on global warming. In this editorial, we will explore how to tát effectively use tree planting to tát enhance carbon permanence and mitigate the detrimental effects of climate change.

Fig. 1
figure 1

Effectiveness of planting trees in the forms of afforestation or reforestation and dedicated crops in mitigating climate change

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Afforestation and reforestation

Afforestation and reforestation are strategies for mitigating the impacts of climate change. Indeed, trees capture carbon dioxide (CO2) from the atmosphere during growth and store carbon in living biomass, dead organic matter, and soils, making forestation a negative emissions method. Afforestation involves establishing new forests, while reforestation involves re-establishing previous forest areas that have undergone deforestation or degradation. Depending on the tree species, CO2 uptake during forest growth may span 20–100 years until the trees reach maturity, after which sequestration rates slow down significantly. At this stage, forest products can be harvested and utilized. However, it is argued that forest management practices and activities have a significant environmental impact and should be carefully planned to tát ensure that the co-benefits of afforestation and reforestation are maximized (Royal Society 2018). These co-benefits include improved biodiversity, flood control, and enhanced quality of soil, water, and air (Harper et al. 2018).

Vulnerable carbon storage

Carbon storage in forests can be a highly effective means of reducing greenhouse gas emissions, but permanent storage is vulnerable to tát natural and human disturbances (Fig. 2). Indeed, forests face risks from natural disasters such as fire, droughts, and disease, as well as human-induced deforestation activities, which can compromise the integrity of carbon storage. Unlike storage in geological formations, biogenic storage has a much shorter lifespan, making it important to tát protect forests and manage them sustainably (Fuss et al. 2018). Furthermore, forestation projects require significant amounts of land, which may compete with other land uses (Royal Society 2018).

Fig. 2
figure 2

Challenges of afforestation and reforestation in the context of climate change. These challenges include forest diseases, drought, and fire, which can impede the growth of trees and reduce their carbon sequestration potential. Moreover, after 20–100 years, the carbon sequestration rate of trees may slow down or plateau, which poses additional challenges to tát sustaining carbon sequestration over the long term

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Local warming

The albedo effect is another issue that needs to tát be considered when deploying forestation projects. Indeed, forests at high latitudes can actually accelerate local warming and loss of ice and snow cover, while tropical areas are more suitable for hosting such projects. However, competition with agriculture and other sectors for land may pose challenges. According to tát Fuss et al. (2018), an estimated total area of 500 Mha within global tropical boundary limitations is suitable for forestation deployment, with a global carbon dioxide removal potential of 0.5—3.6 Gt CO2 per year by 2050. The estimated removal costs range from $5 to tát 50 per ton of CO2. Thus, while forestation can be an effective means of carbon storage, it is crucial to tát carefully consider the challenges and limitations associated with it and develop sustainable management practices to tát ensure the long-term permanence of carbon storage.

Failure of past carbon sequestration plans

Afforestation and reforestation have been adopted globally and integrated into climate policies through the Kyoto Protocol’s Clean Development Mechanism program since the 1990s. The introduction of removal units allowed forestation projects to tát yield tradable credits. However, despite early policy measures, forest-based mitigation efforts accounted for only a small fraction of emissions at that time. In addition to tát national regulations, the United Nations introduced the Reducing Emissions from Deforestation and Forest Degradation (REDD+) program in 2008 to tát promote forest-based abatement projects. However, carbon sequestration through forestation remained insignificant, accounting for only 0.5% of total carbon trading in 2013 (Gren and Aklilu 2016). The effectiveness of the REDD+ program is argued in the literature after more than thở 10 years of the program introduction. For example, Hein et al. present a number of arguments around the program’s poor track record in achieving its intended purpose of emissions reduction. However, despite the uncertainty and weaknesses discussed, REDD+' implementation intentions have been indicated by 56 countries in their intended nationally determined contributions (INDC) submissions under the Paris agreement (Hein et al. 2018). Permanence, sequestration uncertainty, the availability of efficient financing mechanisms as well as monitoring, reporting and verification systems are all difficulties associated with forest-based abatement projects (Gren and Aklilu 2016). To enhance the effectiveness of forest-based abatement projects, improved financing mechanisms and better monitoring and reporting systems are required.

Biochar is stable and carbon negative

The process of capturing CO2 through photosynthesis is a well-established natural process, but to tát make it a more effective solution for mitigating climate change, it needs to tát be integrated with technology. Combining tree planting with biochar or bioenergy carbon capture and storage (BECCS) makes it possible to tát extend the permanence of carbon sequestered by forests while derive additional benefits (Fig. 3). This approach can help to tát address some of the challenges associated with forest-based abatement projects, such as carbon leakage, verification, reporting and monitoring, as well as a capacity plateau. Biochar is a highly promising negative emissions technology that offers a unique way to tát capture atmospheric carbon and store it in a stable size for extended periods. This process involves the photosynthetic capture of carbon during plant growth, followed by a thermochemical conversion process that produces a solid carbonaceous material that is highly resistant to tát thermal and biological degradation and can persist for centuries to tát millennia. Biochar can then be safely stored in soils, building structures, and various carbon sinks, providing additional benefits depending on its final application (Fawzy et al. 2021, Osman et al. 2022, Monisha et al. 2022, Lin et al. 2023). Biochar's stability and adaptability make it an appealing option for achieving carbon permanence and moving climate change mitigation efforts forward.

Fig. 3
figure 3

Maximizing carbon removal through the integration of dedicated crops and technology. The figure illustrates the process of cultivating fast-growing crops on marginal land using wastewater, followed by biomass pyrolysis to tát produce highly stable carbon biochar. The resulting biochar is then stored in various carbon sinks, including soils, building structures, and other reservoirs, offering additional benefits depending on its intended use. By employing this approach, carbon removal can be maximized, resulting in substantial carbon sequestration and sustainable land use

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Bioenergy carbon capture and storage

Bioenergy carbon capture and storage (BECCS) is a promising negative emissions technology (IPCC 2018). This technology integrates biopower and carbon capture and storage to tát drawdown atmospheric CO2 through biomass during growth, which is then utilized for energy production through combustion. CO2 emissions generated during combustion are subsequently captured and stored in geological reservoirs (RoyalSociety 2018; Pires 2019). BECCS has been identified by the Intergovernmental Panel on Climate Change (IPCC) as a potential route to tát meeting temperature goals (IPCC 2018). This technology can significantly reduce greenhouse gas concentration levels by removing CO2 from the atmosphere. The carbon dioxide removal potential of this technology varies within the literature; however, a conservative assessment by Fuss et al. presents an estimated range of 0.5–5 Gt CO2 yr−1 by 2050 (Fuss et al. 2018). Regarding global estimates for storage capacity, the literature presents a wide range from 200 to tát 50,000 Gt CO2 (Fuss et al. 2018).

Integrating dedicated crops and technology

The integration of tree planting, through the cultivation of fast-growing crops or short-rotation plantations, within a technological framework, such as biochar or BECCS, delivers a robust and effective carbon removal system that provides a variety of co-benefits (Fig. 3). Perhaps the most essential advantage is ensuring long-term carbon storage permanence. Additionally, this approach enhances land use efficiency since land is used in short cycles to tát sequester carbon, thereby overcoming the growth plateau issue associated with forestation. Moreover, this approach ensures the consistent biomass supply to tát biochar or BECCS projects, where costs are stable, and biomass quality is controlled. Finally, a dedicated carbon cropping system offers additional carbon sequestration potential via soil organic carbon throughout the plantation’s lifecycle.

However, it’s important to tát note that converting carbon-dense ecosystems into dedicated plantations can negatively affect greenhouse gas emissions through land-use change. Furthermore, competition with food production for resources such as land, nutrients, and water may be a significant disadvantage to tát dedicated biomass cultivation. To mitigate these issues, it’s essential to tát use marginal lands and carry out cultivation in a sustainable manner, while utilizing resources that vì thế not compete with food production systems (Fawzy et al. 2020).


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