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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
Land Mammals
Fish
Atmosphere
Birds
Groundwater
Invertebrates
Reptiles
Marine Mammals
Insects
	Unusual or Unexpected Event
	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020
Ice / Snow Change
Extreme Precipitation
Seasonal Timing
Flooding / Draining
Landslide / Avalanche
Extreme Temperature
Extreme Wind
Erosion
Rain on Snow
Permafrost Change
Storm Surge
Fire
Earthquake
Cyclone / Hurricane
Thunderstorm
Eruption
Sea/Land Level Change
Pollution
Death / Die-off / Decline
Drought
Unusual Range / Sighting
Unusual Size / Abundance
Sinkhole / Crater
Algal Bloom
Glacier Change
	Impact on Human Environment
	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020
Transportation
Buildings
Human Health
Energy
Sanitation
Economic Impact
Sports / Recreation
Safety
Food Security
Cultural Impact
Air Quality
Agriculture
Livestock
Displacement
Water Security
Pets
Harvest Change