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• Topic Timeline (Yearly)

	Natural Environment
	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022
Weather
Land
Air
Surface Waters / Wetlands
Ocean / Sea
Plants / Kelp
Land Mammals
Microbes
Fish
Marine Mammals
Reptiles
Insects
Birds
	Unusual or Unexpected Event
	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022
Extreme Temperature
Flooding / Draining
Extreme Precipitation
Ice / Snow Change
Fire
Landslide / Avalanche
Pollution
Erosion
Seasonal Timing
Extreme Wind
Unusual Size / Abundance
Debris / Trash
Pathogen
Permafrost Change
Storm Surge
Algal Bloom
Unusual Animal Behavior
Deformity / Disease / Injury
Earthquake
Tsunami
	Impact on Human Environment
	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022
Human Health
Buildings
Sanitation
Transportation
Energy
Safety
Agriculture
Pets
Economic Impact
Air Quality
Livestock
Sports / Recreation
Communication
Displacement
Cultural Impact
Radiation