1.pay close attention to the diet
2.be aware of the seriousness of the problem
3.introduction of modern technology
4.man-made fertilizer
5.bring ecocomic profit to people
6.with the development of modern agriculture
7.make the most of natural gas
1.pay close attention to the diet
2.be aware of the seriousness of the problem
3.introduction of modern technology
4.man-made fertilizer
5.bring ecocomic profit to people
6.with the development of modern agriculture
7.make the most of natural gas