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

	Natural Environment
	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019
Ocean / Sea
Plants / Kelp
Weather
Fish
Land
Invertebrates
Microbes
Surface Waters / Wetlands
Land Mammals
Birds
Air
Marine Mammals
Reptiles
Insects
	Unusual or Unexpected Event
	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019
Ice / Snow Change
Death / Die-off / Decline
Seasonal Timing
Extreme Temperature
Unusual Size / Abundance
Algal Bloom
Erosion
Unusual Range / Sighting
Pollution
Extreme Precipitation
Landslide / Avalanche
Earthquake
Rain on Snow
Drought
Extreme Wind
Storm Surge
Infestation
Permafrost Change
Fire
Deformity / Disease / Injury
Flooding / Draining
Cyclone / Hurricane
Thunderstorm
Unusual Animal Behavior
Sea/Land Level Change
Tsunami
	Impact on Human Environment
	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019
Economic Impact
Sports / Recreation
Buildings
Human Health
Food Security
Transportation
Cultural Impact
Agriculture
Energy
Pets
Water Security
Air Quality
Harvest Change
Sanitation
Aquaculture
Livestock
Fisheries
Radiation