Their experimentation with drugs, for example, was so widespread that as of the mid - 1990 ’ s, the illegal drug trade was worth an estimated $500 billion a year, making it, as one source says, “the single most lucrative business sector in the world. ”
एक किताब कहता है, “इस धंधे में इतना फायदा हुआ है कि दुनिया का कोई और व्यवसाय इसका मुकाबला नहीं कर पाया । ”