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• Topic Timeline (Yearly)

	Natural Environment
	2013	2014	2015	2016	2017	2018	2019	2020	2021
Weather
Ocean / Sea
Fish
Air
Land
Surface Waters / Wetlands
Plants / Kelp
Land Mammals
Invertebrates
Marine Mammals
Birds
Insects
Microbes
Groundwater
Reptiles
Arachnids
	Unusual or Unexpected Event
	2013	2014	2015	2016	2017	2018	2019	2020	2021
Extreme Temperature
Ice / Snow Change
Seasonal Timing
Death / Die-off / Decline
Unusual Range / Sighting
Drought
Extreme Precipitation
Permafrost Change
Rain on Snow
Extreme Wind
Flooding / Draining
Algal Bloom
Unusual Animal Behavior
Unusual Size / Abundance
Erosion
Glacier Change
Fire
Infestation
Storm Surge
Deformity / Disease / Injury
Pollution
Pathogen
	Impact on Human Environment
	2013	2014	2015	2016	2017	2018	2019	2020	2021
Cultural Impact
Food Security
Economic Impact
Sports / Recreation
Human Health
Buildings
Transportation
Water Security
Energy
Safety
Fisheries
Livestock
Aquaculture
Sanitation
Air Quality
Forestry
Displacement
Agriculture