In this photo, you can see dead brown trees.

B.C. forests are being attacked by the spruce bud worm: the spruce, larch and pine trees. The pine bark beetle is also a major problem. Some areas are already devastated. Links: http://www.na.fs.fed.us/spfo/pubs/fidls/westbw/fidl-wbw.htm
http://www.ext.colostate.edu/pubs/insect/05528.html