Step-by-step explanation:
According to me ...the fertilizer industry has geared up in recent years due to these reasons..
1 Decline of people using manure and organic wastes in farming
2 As agriculture is gearing speed people find fertilizer better and fast
3 fertilizers are helpful in large productions for such large population
4 agriculture needs to be fast today and thus fast nutrients like fertilizers are used
5 today mostly single crop or cash crop planting is done and it requires specific nutrient in large amounts that can be given only by fertilizers