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• Topic Timeline (Monthly)
• Topic Timeline (Yearly)

	Natural Environment
	2010	2011	2012	2013
Marine Mammals
Surface Waters / Wetlands
Weather
Ocean / Sea
Land Mammals
Fish
Insects
Invertebrates
Birds
Plants / Kelp
Land
Air
Microbes
Reptiles
Arachnids
Groundwater
Amphibians
	Unusual or Unexpected Event
	2010	2011	2012	2013
Ice / Snow Change
Seasonal Timing
Unusual Range / Sighting
Permafrost Change
Parasite
Deformity / Disease / Injury
Death / Die-off / Decline
Unusual Size / Abundance
Erosion
Pollution
Flooding / Draining
Extreme Precipitation
Extreme Wind
Extreme Temperature
Unusual Animal Behavior
Algal Bloom
Storm Surge
Rain on Snow
Landslide / Avalanche
Sea/Land Level Change
Physical or Chemical Change
Earthquake
Tsunami
Cyclone / Hurricane
Drought
Infestation
	Impact on Human Environment
	2010	2011	2012	2013
Buildings
Food Security
Human Health
Transportation
Sanitation
Water Security
Economic Impact
Cultural Impact
Air Quality
Energy
Sports / Recreation
Safety
Livestock
Radiation
Agriculture
Forestry