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

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