With ecology a national concern by 1970, Chiles announced his opposition to the Cross Florida Barge Canal, which had originally been supported by every member of the Florida congressional delegation. The project, one-third completed, was cancelled early in 1971 and is now a protected green belt corridor. Chiles endorsed federal funding to remove waste from the bass-teeming Lake Apopka in central Florida. By contrast, Cramer received little credit from environmentalists although he had drafted the Water Pollution Control Act of 1956 and had sponsored legislation to protect alligators, stop beach erosion, dredge harbors, and remove oil spills. Instead, Cramer's critics accused him of having weakened anti-pollution laws. Cramer questioned Chiles's opposition to a proposed severance tax on phosphate mining, which particularly impacted Tampa Bay. Cramer declared that "Liberal Lawton has protected the phosphate industry -- the state's single largest polluter."