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• Topic Timeline (Yearly)

	Natural Environment
	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020
Weather
Surface Waters / Wetlands
Land
Fish
Ocean / Sea
Plants / Kelp
Marine Mammals
Birds
Insects
Land Mammals
Microbes
Groundwater
Invertebrates
Fungi
Arachnids
Amphibians
Air
Reptiles
	Unusual or Unexpected Event
	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020
Extreme Temperature
Ice / Snow Change
Seasonal Timing
Death / Die-off / Decline
Erosion
Permafrost Change
Unusual Range / Sighting
Unusual Size / Abundance
Extreme Precipitation
Algal Bloom
Drought
Pollution
Rain on Snow
Deformity / Disease / Injury
Flooding / Draining
Unusual Animal Behavior
Fire
Parasite
Landslide / Avalanche
Extreme Wind
Infestation
Storm Surge
Thunderstorm
Cyclone / Hurricane
Pathogen
Earthquake
Tsunami
	Impact on Human Environment
	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020
Cultural Impact
Food Security
Economic Impact
Sports / Recreation
Human Health
Buildings
Transportation
Water Security
Energy
Pets
Burial Site
Harvest Change
Fisheries
Livestock
Safety
Sanitation
Agriculture
Displacement
Air Quality
Aquaculture
Radiation