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Beautiful and fragile coral reefs (珊瑚礁) in tropical oceans worldwide are threatened 【小题1】 climate change and storms. Now 【小题2】 (traveler) can help restore them by supporting coral replanting programs.

National Geographic Explorer Paola Rodríguez-Troncoso 【小题3】 (work) on a Mexican program for six years that sustainably replanted more than 6,000 coral fragments (碎片). In this project, divers collect fragments from the ocean floor 【小题4】have been washed away by storms or waves. Then they fasten 【小题5】 (health) pieces to the substrata (底土层) of reefs at the same or nearby sites. It’s 【小题6】 process that can vary by location. For example, in some areas, such as French Polynesia, the coral fragments 【小题7】 (place) in underwater nurseries to recover before replanting.

Conservation groups are starting to educate and involve visitors in these efforts. 【小题8】 (avoid) programs that may do more harm than good, Rodriguez-Troncoso cautions the persons who break off fragments from healthy corals on purpose or fail to get the 【小题9】 (require) permits. Though replanted fragments grow 【小题10】 (slow)，each one can be part of a reef’s centuries-long life span. Rodriguez-Troncoso says, “That will really help.”