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• Topic Timeline (Yearly)

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