Book excerpt: This book discusses how to develop green transitions which benefit, include and respect marginalised social groups. Diversity and Inclusion in Environmentalism explores the challenge of taking into account issues of equity and justice in the green transformation and shows that ignoring these issues risks exacerbating the gap between the rich and the poor, the marginalised and included, and undermining widespread support for climate change mitigation. Expert contributors provide evidence and analysis in relation to the thinking and practice that has prevented us from building a broad base of people who are willing and able to take the action necessary to successfully overcome the current ecological crises. Providing examples from a wide range of marginalised and/or oppressed groups including women, disabled people, Black, Asian and Minority Ethnic (BAME) people and the lesbian, gay, bisexual, transgender, queer/questioning and others (LGBTQ+) community, the authors demonstrate how the issues and concerns of these groups are often undervalued in environmental policy-making and environmental social movements. Overall, this book supports environmental academics and practitioners to choose and campaign for effective, equitable and widely supported environmental policy, thereby enabling a smoother transition to sustainability. This volume will be of great interest to students, scholars and practitioners of environmental justice, social and environmental policy, planning and environmental sociology.