(CNSNews.com) - Environmental activists are warning church-goers that Palm Sunday services are not compatible with "environmental sustainability." The Commission for Environmental Cooperation and the Rainforest Alliance put out a press release on Friday, reminding Christians about the "unsustainable practices often used to harvest the 30 million chamaedorea palm fronds delivered to Canadian and U.S. Churches" for Palm Sunday services. Most of those palm fronds are harvested in Mexico and Guatemala, and according to the environmental groups, Palm Sunday services account for almost 10 percent of total palm sales in the U.S. "Unfortunately," the environmental activists said, "Peasant workers often harvest...