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• Topic Timeline (Yearly)

	Natural Environment
	2020
Weather
Ocean / Sea
Land
Land Mammals
Marine Mammals
Invertebrates
Surface Waters / Wetlands
Air
Fish
Atmosphere
Birds
	Unusual or Unexpected Event
	2020
Extreme Temperature
Extreme Precipitation
Ice / Snow Change
Unusual Range / Sighting
Death / Die-off / Decline
Flooding / Draining
Extreme Wind
Landslide / Avalanche
Erosion
Unusual Animal Behavior
Permafrost Change
Unusual Size / Abundance
Cyclone / Hurricane
Seasonal Timing
Algal Bloom
Storm Surge
Rain on Snow
Deformity / Disease / Injury
Sea/Land Level Change
Eruption
Pathogen
Glacier Change
	Impact on Human Environment
	2020
Safety
Buildings
Transportation
Economic Impact
Sports / Recreation
Human Health
Energy
Cultural Impact
Forestry
Fisheries
Food Security
Sanitation
Livestock
Pets
Displacement
Air Quality
Water Security