Possible Clues:

• Greek primordial deity
• Greek goddess of the earth: Var
• The goddess of the earth
• Earth is seen to be first-class in Georgia
• ___ hypothesis (ecological theory)
• Gravitas oddly needed for goddess
• Earth as an organism
• 1979 environmental bestseller subtitled 'A new look at life on Earth'
• Earth personified
• Mother and wife of Uranus: Var.