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The principles of natural climate solutions

BACKGROUND:

Natural Climate Solutions (NCS) were consolidated as a holistic concept in 2017, leveraging human interventions in land management to mitigate climate change by adapting existing conservation knowledge for climate action. Over the past six years, the implementation of NCS has seen a rapid increase in attention, as indicated by a significant rise in social media discussions and funding commitments, though these efforts still fall short of the levels required to meet global climate mitigation goals. The authors use a comprehensive review of scientific literature and best practices to distill foundational and operational 

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What works in tropical forest conservation, and what does not: Effectiveness of four strategies in terms of environmental, social, and economic outcomes

Background

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Outcomes and Impacts of Development Interventions: Toward Conceptual Clarity

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The 10 Elements of Agroecology: enabling transitions towards sustainable agriculture and food systems through visual narratives

Background

Agriculture and food systems around the world are failing to deliver the desired outcomes for food security and nutrition, creating an urgent need for transformative change to meet the Sustainable Development Goals (SDGs) by 2030. Addressing this challenge requires stakeholders to adopt holistic approaches that integrate population, diet, and food production, moving beyond a narrow focus on technological advancements and productivity. Agroecology, which incorporates social, political, and economic dimensions, provides a promising pathway to build sustainable and equitable food systems.

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Climate Risk Management

BACKGROUND:

Worldwide efforts are underway to devise and apply strategies to manage these risks effectively. Key challenges in climate risk management include the integration of necessary scientific disciplines, articulating stakeholder values and objectives, and quantifying pivotal uncertainties and trade-offs, all of which are vital for crafting effective management strategies. The paper addresses the intensification of global climate risks driven by accelerating climate change. The authors review these challenges based on existing literature to identify potential avenues to overcome them. 

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Advances and shortfalls in applying best practices to global tree‐growing efforts

BACKGROUND:

Over the past three decades, there has been a rapid increase in the number of organizations engaged in tree planting to meet international targets exceeding a trillion trees. These initiatives aim to sequester carbon, conserve biodiversity, enhance water quality, and reduce social inequity. Despite these goals, frequent failures and unintended ecological and social impacts have led to the creation of numerous best practice guidelines for reforestation.

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Soil organic carbon pool under native tree plantations in the Caribbean lowlands of Costa Rica

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Nitrogen Fixing Trees for Animal Production on Acid Soils

Background 

Nitrogen-fixing trees play a crucial role in improving pasture and livestock systems on acid soils, which are prevalent in tropical regions. Acid soils often challenge agricultural productivity due to low fertility and high aluminum toxicity. Nitrogen-fixing trees, such as Erythrina poeppigiana, Cratylia argentea, and Alnus acuminata, enhance soil chemistry and fertility by adding nitrogen through organic matter and improving physical soil properties like porosity and bulk density. They are integrated into silvopastoral systems, where trees and shrubs coexist with pastures, offering multiple benefits such as soil stabilization, increased forage quality, and diversified farm outputs. 

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Alnus acuminata: Valuable Timber Tree for Tropical Highlands

Background 

Alnus acuminata, also known as alder, is a nitrogen-fixing tree native to tropical highlands from Mexico to northern Argentina. It thrives in elevations between 1,200 and 3,200 meters, with annual rainfall of 1,000 to 3,000 mm and temperatures ranging from 4°C to 27°C. This species plays a significant role in watershed protection, soil enrichment, and sustainable timber production. Its adaptability to moist soils, including riverbanks and landslides, and its resilience in disturbed areas make it a valuable pioneer species. Farmers in regions like Costa Rica have used Alnus acuminata in agroforestry systems for over 90 years, integrating it with pastureland and coffee cultivation.

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Biodiversity conservation in Costa Rica: a correspondence analysis between identifi ed biodiversity hotspots (Araceae, Arecaceae, Bromeliaceae, and Scarabaeinae) and conservation priority life zones

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