The Interfaith Center for Sustainable Development features resources and statements from a variety of religious traditions. The Center also hosts numerous conferences and has published several reports on the current state of ecological education in seminaries and divinity schools today. They also maintain a sizable collection of syllabi on the topic.
The Evangelical Environmental Network admirably incorporates environmental concerns into their pro-life platform, seeking to raise awareness of the impact climate change and pollution will have on human life.
The Mennonite Creation Care Network is one of my favorite denominational bodies and is not limited to a Mennonite audience. Among many highlights are climate-themed pastoral retreats, some great suggestions to help churches re-discover their connection to local environments, tips for responsible living at home or in churches, and an excellent devotional series called Every Creature Singing.
The Catholic Climate Covenant centralizes the Roman Catholic Church's many climate-themed statements and activities. They have a collection of climate-themed teachings from throughout the church, past and present, as well as a large hub dedicated to Laudato Si', Pope Francis's masterful encyclical arguing that climate change should be at the very heart of the Christian message in today's world. The CCC also operates Catholic Energies, which helps buildings practically improve their carbon footprint.
The Presbyterian Church (USA) operates Presbyterians for Earth Care: An Eco-Justice Network. They wrote a guide for churches to become more environmentally-friendly, are actively divesting from fossil fuels, and have a well-stocked page of creation care devotionals and worship guides.
There are also somewhat smaller organizations run by the United Methodist Church (Caretakers of God's Creation), Lutheran Church (ELCA) (Lutherans Restoring Creation), and the Quaker Earthcare Witness, as well as the National Religious Partnership for the Environment. I also like the Saint Kateri Conservation Center, a Catholic-affiliated group that houses a thorough library of ecological quotes in scripture, theology, and the church fathers.
Sewanee's (The University of the South) School of Theology houses a Center for Religion and the Environment. The Center offers a one-week certificate in Contemplation and Care for Creation, as well as numerous courses for both students and the broader community. The Center's list of publications is brief but polished. Sewanee also offers a MA program with a concentration on Religion and the Environment.