Topic 1: Increasing travels between countries enable people to learn different cultures or to increase tension between people from different countries

on this hypothesis?
 
Globally, environmental degradation has been recognised as one of the main challenges that people have 
to overcome in the 21st century. The rapid deterioration of environment is believed to impose a severe 
threat 
on  people's  survival 
in  the  years  ahead, 
if  not  solved  effectively.  In  addressing  this  issue, 
countries worldwide should join forces and make a concerted effort, instead of working individually for 
inconsistent targets. 
The first point to support international cooperation is that the impact of an environmental problem can 
be