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

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