100+ Accelerator seeks companies that create products and goods that optimize water use, decarbonize value chains, help farmers produce sustainable and regenerative crops, and/or protect, renew, and grow the biodiversity of all ecosystems to sustain life on Earth. The Accelerator delivers 6 months of remote training to accelerate the collaboration and growth of cohort companies. Participants have access to mentor networks and may receive up to US$100 thousand toward pilot execution. The challenge has an open deadline. Action Challenges
no deadline
Zoologische Gesellschaft für Arten- und Populationsschutz — Conservation of Globally Threatened or Data Deficient Species
The primary goal of the Zoological Society for the Conservation of Species and Populations (ZGAP) is the conservation of unknown, but highly endangered species and their natural habitats. ZGAP funds conservation projects for globally threatened or data-deficient species, subspecies, and populations. Support is often given to young scientists from the developing world who are eager to implement conservation projects in their home countries. The maximum funding amount per project is €5 thousand. Please note that projects in the wealthier industrial countries (Western Europe, North America, Australia, and Japan) are only supported in exceptional cases. There is no application deadline. Find the guidelines for application here
Finnish Government — Recruiting Foreign Doctoral Students
The EDUFI Fellowship provides initial funding to carry out research for a doctoral thesis in Finland. Researchers or Teachers in Finnish university departments, who wish to recruit a doctoral student or a young researcher from outside Finland, can apply on behalf of the foreign student. The fellowship grant is intended for post-graduate studies as well as research and teaching cooperation in Finnish universities and covers the living costs of the fellow. The EDUFI Fellowship is available to all foreign nationals and all fields of study. Applications are accepted anytime. Link to EDUFI Fellowship
World Land Trust — Land Purchase for Conservation
The Trust provides funding for the initial acquisition of land that has conservation importance. It also funds additional activities related to protection, biodiversity monitoring, education, outreach, habitat restoration, and species reintroduction. The Trust works with legally registered and experienced conservation NGOs based in developing countries. Qualified conservation organizations that seek to become partners prepare a project proposal that follows the Trust’s criteria. There is no calendar deadline. About Buy an Acre
Rufford Foundation — Grants for Nature Conservation
The Rufford Foundation makes grants for nature conservation undertaken by small and medium-sized organizations for projects in the developing world. The Foundation prefers projects that are pragmatic, and that have a significant human element. There are no restrictions by nationality or country of residence. Grant applications are made in sequential stages: first grant, second grant, booster grants, and completion grant. Grants start at £6 thousand and increase to £15 thousand for projects that complete each stage. Applications can be submitted at any time. Instructions for Applicants
The Explorers Club — Impact Grants
The Explorers Club Impact Grants support individual researchers and explorers worldwide who conduct field-based scientific expeditions in disciplines such as ecology, earth sciences, anthropology, archaeology, paleontology, and astronomy—especially exploring regions experiencing environmental or cultural change. Grants typically range from US$10 thousand to US$25 thousand, covering expenses for on-site fieldwork. Applications are accepted on a rolling basis. Explorers Club Impact Grants
Pulitzer Center — Ocean and Fisheries Reporting Grant
The Pulitzer Center invites applications for its Ocean and Fisheries Reporting Grant, which supports in-depth journalism on underreported issues such as illegal fishing, marine pollution, and the impacts of climate change on coastal communities. The program is open to all journalists, including staff reporters, freelancers, photographers, and filmmakers from any country. Proposed projects should focus on systemic threats to marine biodiversity or the global supply chains that drive resource depletion. Grant amounts typically range from US$5 thousand to US$15 thousand, covering hard reporting costs such as travel, lodging, and data analysis. Applications are reviewed on a rolling basis. Ocean and Fisheries Reporting Grant
UNICEF — WASH Innovation Hub
UNICEF invites applications for its WASH Innovation Hub to support solutions that improve water, sanitation, and hygiene services. The program is open to startups, social enterprises, and non-profit organizations globally that offer scalable technologies or business models addressing water scarcity and sanitation safety. Selected participants may receive seed funding, technical mentorship, and the opportunity to pilot their innovations in UNICEF-supported programs; however, specific grant amounts vary by the project’s scale and stage. Applications are accepted on a rolling basis. For more information, click here
International Renewable Energy Agency — Climate Investment Platform
The International Renewable Energy Agency (IRENA) manages the Climate Investment Platform (CIP) to accelerate renewable energy projects in developing countries. This joint initiative provides technical assistance and financial matchmaking for project developers, governments, and private businesses. While the CIP focuses on project facilitation rather than direct grants, it helps developers access a network of partners offering equity, debt, and risk-mitigation instruments; smaller technical assistance grants can start at US$10 thousand, while larger infrastructure projects often require capital expenditures of at least US$10 million. Registrations for projects in Latin America are accepted on a rolling basis. Climate Investment Platform
Pulitzer Center — Global Reporting Grant
The Pulitzer Center Global Reporting Grant supports in-depth, high-impact reporting on critical issues that are often overlooked in the media, from global health to climate change. The Pulitzer Center will provide a travel grant of US$5 thousand for a reporting project on topics of global importance. The Grant is open to all journalists, writers, photographers, radio producers, filmmakers, staff journalists as well as freelancers and media professionals from any developing country. Applications can be submitted anytime. Pulitzer Center Global Reporting Grant