What is the main cause of extinction on earth today?

Causes of Extinction Some major causes of extinction are: Taking Animals for Profit; Hunting and Trapping; Overharvesting; Introduction of "Alien" Species; etc. But the single greatest and growing threat is habitat alteration/destruction resulting from human actions. read more

Even today, though, extinctions are still happening, but on a much smaller scale. Answer and Explanation: The main cause of extinction on Earth today is humanity and human activity. read more

The rapid loss of species today is estimated by some experts to be between 100 and 1,000 times higher than the natural extinction rate, while others estimate rates as high as 1,000-11,000 times higher. read more