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• Topic Timeline (Yearly)

	Natural Environment
	2019	2020	2021
Weather
Surface Waters / Wetlands
Ocean / Sea
Land
Land Mammals
Marine Mammals
Fish
Plants / Kelp
Birds
Insects
Invertebrates
Air
Groundwater
Atmosphere
Microbes
Arachnids
Fungi
Reptiles
Amphibians
	Unusual or Unexpected Event
	2019	2020	2021
Extreme Temperature
Unusual Range / Sighting
Ice / Snow Change
Death / Die-off / Decline
Extreme Precipitation
Flooding / Draining
Seasonal Timing
Landslide / Avalanche
Unusual Animal Behavior
Unusual Size / Abundance
Extreme Wind
Fire
Permafrost Change
Drought
Pathogen
Deformity / Disease / Injury
Erosion
Algal Bloom
Pollution
Rain on Snow
Infestation
Parasite
Storm Surge
Glacier Change
Thunderstorm
Cyclone / Hurricane
Eruption
Sea/Land Level Change
Earthquake
Debris / Trash
Sinkhole / Crater
Tsunami
Physical or Chemical Change
	Impact on Human Environment
	2019	2020	2021
Safety
Buildings
Human Health
Sports / Recreation
Transportation
Food Security
Economic Impact
Cultural Impact
Energy
Air Quality
Water Security
Pets
Displacement
Fisheries
Sanitation
Agriculture
Livestock
Forestry
Aquaculture
Harvest Change
Burial Site
Radiation
Relocation
Water Management