một sự cải thiệt công nghệ trong sản xuất ảnh hưởng như thế nào đến sự cân bằng của các dòng luân chuyển trong mô hình cân bằng vật chất

Ineed with what i should write for my research paper. my topic is history of slavery. 1800 words. all i need is what to write in each paragraphs. like when the research paper has titles for each paragraph and it explains the tile in each paragraph. for example when did slaverh begin? why did it begin like an outline.

Why did river valleys most farming impact the lives of neolithic peoples?

From 1990 to 2008, by what percent did the world’s most developed economies cut their greenhouse gas emissions?