What are Natural events?

What are bushfires?

What impact does fire have on the ecosystems?

How does eucalyptus survive bushfires?

What is epicormic growth?

What is a lignotuber?

What is a Mallee?

What is a drought?

How can drought change ecosystem?

How does soil affect the ecosystems during a drought?

What is a habitat destruction?

What is overcropping?

What are feral animals?

What are introduced species?

What is a insecticides?

What is global warming?

What is chemical pollution?

Flooding

How does flooding affect the ecosystem?

What is the most significant problem in oceans and lakes?