Guest authors

We also encourage our community of partners to contribute their expert views, insights and experiences. A full list of our guest authors and former staff is below

Sam Greene

Sam Greene was a senior researcher in IIED's Climate Change research group until September 2023

Maryanne Grieg-Gran

Noemi Grutter

Alliance coordinator, Global Alliance for Green and Gender Action (GAGGA)

Alejandro Guarín

Alejandro Guarín was a principal researcher in IIED's Shaping Sustainable Markets research group until September 2024

Suranjana Gupta

Brooke Guven

Brooke Güven is legal researcher at the Columbia Center on Sustainable Investment (CCSI)

Senay Habtezion

Gladys Habu

Pharmacist at the Solomon Islands National Referral Hospital and UNICEF Pacific Supporter 

Ruth Hall

Marcio Halla

Director of the territorial governance mechanism, Forest Trends

Ricarda Hammer

Masroora Haque

Jorgelina Hardoy

Mariel Harrison

Pamela Hartley Pinto

Development practitioner from Perú

Arif Hasan

Amal Hashim

Social development and policy graduate

Anaa Hassan

Associate (climate finance), IIED's Climate Change research group

Paul Hatanga

Aissata Hathie

Assistant associate, IED Afrique’s land governance team

Jenny Hawley

Jenny Hawley is a freelance consultant and editor of Why Women Will Save the Planet

David Hebditch

Chris Henderson

Adrian Henriques

Cameron Hepburn

Cameron Hepburn is Professor of Environmental Economics, Smith School, University of Oxford, and Director of Economics of Sustainability, INET, Oxford Martin School

Ced Hesse

Senior associate, Climate Change

Charlotte Hicks

Technical officer at the UN Environment Programme World Conservation Monitoring Centre, working on climate change and biodiversity

Ebony Holland

Ebony Holland was a principal researcher and nature-climate policy lead in IIED's Natural Resources/Climate Change research groups until December 2025

Pernille Holtedahl

Pernille Holtedahl is the founder of Blue Maia, a green finance advisory firm

Daniel Hoornweg

Daniel Hoornweg ([email protected]) is associate professor in the Faculty of Energy Systems and Nuclear Science at the University of Ontario Institute of Technology (UOIT) 

Xiaoting Hou Jones

 Xiaoting Hou Jones was a senior researcher in the biodiversity team of IIED's Natural Resources research group until March 2024

Lisa Hunsinger

Advisor of the water component of the Thai-German Climate Programme, a cooperation project implemented by GIZ, focusing on integrating climate change adaptation into the Thai water sector

Saleemul Huq

Saleemul Huq was formerly director of IIED's Climate Change research group, and a senior fellow and senior associate

Efadul Huq

Assistant professor of Environmental Science and Policy at Smith College, USA

Megan Huth

Senior associate, Tetra Tech’s land tenure and property rights sector; project manager, USAID Integrated Land and Resource Governance (ILRG)

Yamikani Idriss

Environmental officer and LIFE-AR National Focal Point, Ministry of Forestry and Natural Resources, Government of Malawi

Inge Inge Tvedten

Anthropologist and senior researcher, Chr. Michelsen Institute

Saadia Iqbal

Former Communications Officer (maternity leave)

Dian Irawaty

Olivier Ishimwe

Junior climate negotiator and communications officer at The Green Protector, Rwanda

Laila Iskandar

Egypt's former Minister of Environment and Minister of Informal Settlements; and community development organiser.

Maria Jardim

Pa Jarju

Ibrahim Jarso and Hausner Wendo's picture

Ibrahim Jarso and Wendo

Ibrahim Jarso is a rangelands specialist at MercyCorps and Hausner Wendo is a climate information and reslience planning officer at the Adaptation Consortium

Susan Jepsen

Fundraising and communications specialist at Honeyguide

Jean Jerome

Cassidy Johnson

Professor, Bartlett Development Planning Unit, UCL

Kevin Johnstone

Kevin Johnstone was a senior researcher in IIED's Shaping Sustainable Markets research group until January 2026