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

	Natural Environment
	2010	2011	2012	2013
Marine Mammals
Weather
Surface Waters / Wetlands
Ocean / Sea
Fish
Insects
Land Mammals
Plants / Kelp
Land
Invertebrates
Birds
Microbes
Air
Arachnids
Fungi
Reptiles
Groundwater
Amphibians
	Unusual or Unexpected Event
	2010	2011	2012	2013
Ice / Snow Change
Seasonal Timing
Permafrost Change
Unusual Range / Sighting
Deformity / Disease / Injury
Parasite
Death / Die-off / Decline
Extreme Precipitation
Pollution
Extreme Temperature
Unusual Size / Abundance
Erosion
Flooding / Draining
Extreme Wind
Unusual Animal Behavior
Algal Bloom
Storm Surge
Glacier Change
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
Fisheries
Livestock
Radiation
Agriculture
Forestry