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• Topic Timeline (Yearly)

	Natural Environment
	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020
Weather
Land
Surface Waters / Wetlands
Ocean / Sea
Air
Plants / Kelp
Fish
Land Mammals
Insects
Birds
Atmosphere
Invertebrates
Groundwater
Microbes
Marine Mammals
Amphibians
Reptiles
Arachnids
Fungi
	Unusual or Unexpected Event
	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020
Ice / Snow Change
Extreme Precipitation
Flooding / Draining
Extreme Wind
Erosion
Landslide / Avalanche
Permafrost Change
Extreme Temperature
Fire
Seasonal Timing
Storm Surge
Cyclone / Hurricane
Rain on Snow
Earthquake
Sea/Land Level Change
Pollution
Tsunami
Unusual Size / Abundance
Thunderstorm
Glacier Change
Death / Die-off / Decline
Infestation
Drought
Sinkhole / Crater
Unusual Animal Behavior
Unusual Range / Sighting
Pathogen
Algal Bloom
Eruption
Debris / Trash
	Impact on Human Environment
	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020
Buildings
Transportation
Human Health
Energy
Sanitation
Safety
Economic Impact
Sports / Recreation
Displacement
Water Security
Cultural Impact
Agriculture
Livestock
Air Quality
Pets
Food Security
Forestry
Burial Site
Relocation
Water Management
Fisheries
Harvest Change