Conclusion
The eruption of 1991 was really dangerous, but luckily there was an evacuation. With that evacuation they saved tens of thousands of lives. The volcano is still dangerous, but after the eruption in 1991 it became less dangerous. Volcanic eruptions give a lot of damage most of the time, also in the eruption in 1991. Eruptions also provide good things, like fertile ground. But during eruptions people die or get wounded and after an eruption you have to build up everything again. So eruptions influence humans on a good and bad way.
SOurces:
http://en.wikipedia.org/wiki/Mount_Pinatubo
http://nl.wikipedia.org/wiki/Mount_Pinatubo
http://en.wikipedia.org/wiki/Caldera
http://pubs.usgs.gov/fs/1997/fs113-97/
http://www.vulkanen.nl/pages/page.asp?page_id=3461
http://www.universetoday.com/32576/
http://www.gmanetwork.com/news/story/256373/news/regions/over-20-years-after-mount-pinatubo-eruption-aeta-victims-still-struggling
http://www.youtube.com/watch?v=NQzGjGKdGvQ
http://tourism-philippines.com/mt-pinatubo/
http://www.lakbaypilipinas.com/travel_packages/mount_pinatubo_tour_packages.html
http://clarkisit.com/cii/pinatubo-eruption-circa-1991-the-sleeping-giant-awakens/
http://www.earthobservatory.sg/resources/maps/subduction-zone-beneath-philippines#.Um1flRDBROk
http://mancono.tripod.com/earthquake_phils.html
http://fr.wikipedia.org/wiki/Pinatubo
http://wikimapia.org/74010/Mount-Pinatubo
http://nl.wikipedia.org/wiki/Mount_Pinatubo
http://en.wikipedia.org/wiki/Caldera
http://pubs.usgs.gov/fs/1997/fs113-97/
http://www.vulkanen.nl/pages/page.asp?page_id=3461
http://www.universetoday.com/32576/
http://www.gmanetwork.com/news/story/256373/news/regions/over-20-years-after-mount-pinatubo-eruption-aeta-victims-still-struggling
http://www.youtube.com/watch?v=NQzGjGKdGvQ
http://tourism-philippines.com/mt-pinatubo/
http://www.lakbaypilipinas.com/travel_packages/mount_pinatubo_tour_packages.html
http://clarkisit.com/cii/pinatubo-eruption-circa-1991-the-sleeping-giant-awakens/
http://www.earthobservatory.sg/resources/maps/subduction-zone-beneath-philippines#.Um1flRDBROk
http://mancono.tripod.com/earthquake_phils.html
http://fr.wikipedia.org/wiki/Pinatubo
http://wikimapia.org/74010/Mount-Pinatubo