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• Topic Timeline (Yearly)

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