Out of the 19 groups of orcas studied, 10 of them were designated as at a "high risk of collapse" over the coming century because of PCB exposure alone.
The rise in temperature and the emerging heat-waves, mainly created by the global warming, could kill millions of lives from every region of the world.
According to a report, 29.3 million hectares of forest land has been lost from 2000 to 2014. According to the research paper's lead author, one of the main reasons for a majority of this is destruction was to make way for farming land.