Simplify the following text for a Grade 10 native English-speaking person.
Original: In 2000 , Congress passed the Comprehensive Everglades Restoration Plan , a $ 7.8 billion , 30-year project aimed at preserving and restoring the region and its unique combination of environments .
Simplified: In 2000 , Congress passed the Comprehensive Everglades Restoration Plan , a $ 7.8 billion , 30-year project aimed at preservation and restoration of the region and its unique combination of environments .