Food plays a big role in Ramadan. But food waste shouldn’t, according to a growing number of Muslims.

President Donald Trump has undone or renegotiated many of his predecessor’s environmentally friendly policies, removing climate change research from government websites and pulling out of the Paris climate agreement. Religiously inspired environmental activists have emerged as some of his loudest critics.

Fuji Lozada is a professor of anthropology and environmental studies at Davidson College in Davidson, N.C., where he specializes in Chinese society. He teaches a course titled “Science, Religion and Society.”

Rachel Hart Winter is the director of the Siena Center at Dominican University in River Forest, Ill. Her research focuses on Catholic ecological ethics, particularly on access to clean water as a fundamental human right. Contact via Tina Weinheimer, assistant director of public relations and communications for the university.

The Catholic Church, environmentalists and many ecology activists have high hopes for the encyclical, but others worry that the pope’s approach will be misguided.

Crystal Spring is a mission of the Kentucky Dominican Sisters that works to educate the public on such topics as organic gardening, cooking, ecology, cosmology, spiritual reflection, ecofeminism and creative arts. Crystal Spring operates the Religious Lands Conservancy Project, which helps communities of Catholic women protect their land. It is based in Plainville, Mass.

Michael Schuck is co-director of the International Jesuit Ecology Project and an associate professor of theology at Loyola University in Chicago. He is an expert on the social teachings of papal encyclicals.

AIDRom is a project of the Ecumenical Association of the Churches of Romania that encourages member churches to promote environmental protection, ecological education and sustainable development. Members include the Orthodox Church, the Reformed Church, the German Lutheran Church, the Synodo-Presbyterial Church of AC and the Armenian Orthodox Church. It is based in Bucharest, Romania.

The Conservation Foundation is a secular environmental organization in London that works with the Church of England on environmental issues and programs. One project focuses on educating local bishops in how their congregations can be greener. Contact David Shreeve, executive director.