Complex sentence: Deforestation in Indonesia has had a massive environmental impact on the country, home to some of the most biologically diverse forests in the world, ranking third in number of species behind Brazil and the Democratic Republic of Congo.
Split into simpler sentences: Deforestation in Indonesia has had a massive environmental impact on the country. Indonesia is home to some of the most biologically diverse forests in the world and ranks third in number of species behind Brazil and the Democratic Republic of Congo.