BY REP. RAÚL M. GRIJALVA AND HERMAN HONANIE
The Grand Canyon is recognized by the United Nations as a World Heritage Site thanks in large part to its unsurpassed beauty, which encompasses extensive stretches of old-growth forests, unique geologic features and pristine watersheds. Thousands of plant, animal and aquatic species, some of which are found nowhere else on Earth, thrive above and below the canyon rim, right down to the Colorado River itself. The area has been home to humans for more than 12,000 years, a span that includes some of the earliest known cultures here in North America...