Simplify the following text for a Grade 8 native English-speaking person.
Original: The Ramsar List of Wetlands of International Importance now includes 1,888 sites ( known as Ramsar Sites ) covering around 1,853,000 kmÂ , up from 1,021 sites in 2000 .
Simplified: The Ramsar List of Wetlands of International Importance now includes 1,888 sites , which are called Ramsar Sites , covering around 1,853,000 kmÂ . This has increased from 1,021 sites in 2000 .