The black rhino that had a total population of around 1 million in the beginning of 20th century are already extinct. In last decade we have not observed a single black rhino.
Between 1960 – 1995, around 98% of black rhino population were poached for their horns mainly after Mao Zedong, Chinese communist revolutionary, advocated the usage of rhino horn powder as a cure for debilitating diseases like cancer.
According to estimates, 150 – 200 species of plants, animals and birds become extinct every 24 hours because of humans directly or indirectly(global warming, deforestation,etc).
It is estimated that 30 – 50% of all species will go extinct by 2050.
If this does not stop, the balance of nature will be restored 1 day and we will move back to the caves or cease to exist.