Take the following as truth: In 1982, for example, RCED examined the progress made since the 1970's in cleaning up the nation's air, water, and land, finding that while strides had been made toward meeting the established goals (cleaner air, properly treated wastewater, more drinkable water), deadlines had been extended and unresolved issues made meeting even these deadlines difficult (U.S.
Then the following statement: "Even though progress was made on the environmental front, meeting the extended deadlines was difficult." is true, false, or inconclusive?