Question

why are rain forests important to the world

Answer 1

oxygen........? lol, continued breathing would be nice

Answer 2

Rainforests:

help stabilize the world’s climate;
provide a home to many plants and animals;
maintain the water cycle
protect against flood, drought, and erosion;
are a source for medicines and foods;
support tribal people; and
are an interesting place to visit

They're many Rainforest in Australia - Go visit someday, I'll come with you!