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• Topic Timeline (Yearly)

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