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• Topic Timeline (Yearly)

	Natural Environment
	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021
Surface Waters / Wetlands
Weather
Land
Ocean / Sea
Fish
Plants / Kelp
Groundwater
Land Mammals
Atmosphere
Arachnids
Birds
Amphibians
Fungi
Insects
Invertebrates
Microbes
Marine Mammals
Air
Reptiles
	Unusual or Unexpected Event
	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021
Flooding / Draining
Extreme Precipitation
Ice / Snow Change
Landslide / Avalanche
Erosion
Extreme Temperature
Extreme Wind
Storm Surge
Permafrost Change
Glacier Change
Cyclone / Hurricane
Thunderstorm
Seasonal Timing
Sea/Land Level Change
Death / Die-off / Decline
Pollution
Rain on Snow
Fire
Earthquake
Parasite
Sinkhole / Crater
Unusual Range / Sighting
Drought
Tsunami
	Impact on Human Environment
	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021
Buildings
Transportation
Safety
Human Health
Economic Impact
Sanitation
Displacement
Energy
Sports / Recreation
Cultural Impact
Water Security
Food Security
Agriculture
Livestock
Harvest Change
Fisheries
Burial Site
Pets
Aquaculture
Radiation