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• Topic Timeline (Yearly)

	Natural Environment
	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022
Weather
Surface Waters / Wetlands
Land
Ocean / Sea
Air
Plants / Kelp
Fish
Invertebrates
Groundwater
Birds
Land Mammals
Insects
Arachnids
Amphibians
Marine Mammals
Reptiles
Atmosphere
Fungi
Microbes
	Unusual or Unexpected Event
	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022
Extreme Wind
Ice / Snow Change
Extreme Precipitation
Extreme Temperature
Flooding / Draining
Seasonal Timing
Storm Surge
Drought
Erosion
Landslide / Avalanche
Rain on Snow
Permafrost Change
Pollution
Fire
Thunderstorm
Cyclone / Hurricane
Unusual Size / Abundance
Infestation
Death / Die-off / Decline
Unusual Range / Sighting
Glacier Change
Pathogen
Sinkhole / Crater
Earthquake
	Impact on Human Environment
	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022
Energy
Buildings
Transportation
Human Health
Sanitation
Safety
Economic Impact
Sports / Recreation
Water Security
Cultural Impact
Livestock
Pets
Food Security
Agriculture
Displacement
Communication
Harvest Change
Air Quality
Fisheries
Water Management
Forestry
Aquaculture