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

	Natural Environment
	2020
Weather
Plants / Kelp
Ocean / Sea
Insects
Land
Surface Waters / Wetlands
Land Mammals
Marine Mammals
Fish
Birds
Air
Invertebrates
Atmosphere
Groundwater
Arachnids
	Unusual or Unexpected Event
	2020
Unusual Range / Sighting
Extreme Temperature
Unusual Size / Abundance
Fire
Extreme Precipitation
Permafrost Change
Death / Die-off / Decline
Seasonal Timing
Ice / Snow Change
Flooding / Draining
Pathogen
Pollution
Infestation
Unusual Animal Behavior
Extreme Wind
Deformity / Disease / Injury
Thunderstorm
Earthquake
Landslide / Avalanche
Parasite
Algal Bloom
Erosion
Drought
Glacier Change
Storm Surge
Tsunami
Debris / Trash
Sinkhole / Crater
Rain on Snow
Sea/Land Level Change
	Impact on Human Environment
	2020
Safety
Human Health
Sports / Recreation
Buildings
Food Security
Air Quality
Economic Impact
Fisheries
Transportation
Cultural Impact
Water Security
Harvest Change
Forestry
Energy
Displacement
Agriculture
Radiation
Aquaculture
Pets
Sanitation