Simplify the following text for a Grade 11 native English-speaking person.
Original: Much has been damaged by overgrazing , mining , poorly controlled fires and feral pigs , cane toads , weeds , and other introduced species but Cape York Peninsula remains fairly unspoilt with intact and healthy river systems and no recorded plant or animal extinction since European settlement .
Simplified: Much has been damaged by overgrazing , mining , fires , wild pigs , cane toads , weeds , and other introduced species . But Cape York Peninsula remains fairly unspoilt with intact and healthy river systems and no recorded plant or animal extinction since European settlement .