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

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