    Sentence 1; What are the main threats facing  the Avrazon rainforest in the  cirrent  century?    Sentence. 2: One computer model’ of futtice  climate change caused by greenhouse gas  emissioris shows that. the Amazon cainforest  could: become: unsustainable - under  conditions of severely reduced - rainfall  and increased temperatures, leading to. an  almost complete Loss. of rainforest cover in  the basin by 2100.    