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• Topic Timeline (Monthly)
• 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
Permafrost Change
Fire
Pathogen
Drought
Erosion
Deformity / Disease / Injury
Pollution
Rain on Snow
Algal Bloom
Infestation
Parasite
Storm Surge
Thunderstorm
Glacier Change
Cyclone / Hurricane
Eruption
Sea/Land Level Change
Earthquake
Debris / Trash
Sinkhole / Crater
Tsunami
	Impact on Human Environment
	2019	2020	2021
Safety
Buildings
Sports / Recreation
Human Health
Transportation
Economic Impact
Food Security
Cultural Impact
Energy
Water Security
Pets
Air Quality
Displacement
Fisheries
Sanitation
Agriculture
Livestock
Forestry
Aquaculture
Harvest Change
Burial Site
Radiation
Relocation
Water Management