Are we facing the sixth mass extinction?

So far throughout this blog I've made my attention on the view of the 6th mass extinction. Are we facing the sixth mass extinction? 

Here is a post from other's blog that stated as the extinction rate growing faster and faster, the 6th mass extinction was underway. 

The link is:

http://knsajk.blogspot.co.uk/2011/05/holocene-extinction-on-horizon.html

Besides, here is a video, which made a conclusion to the report "Has the Earth's sixth mass extinction already arrived?". The opinion of the video is to deny that the 6th extinction is underway. However, if we lost most the species that are on the verge of extinction, the extinction event will take place on Earth.

In my opinion, I prefer the point mentioned in the video. That is, we are not in the stage of the 6th mass extinction. But we are near it as if we continue the activities that pollute the environment and destroy the ecosystem, it will lead us to the 6th mass extinction. Therefore, we have to make changes.