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• Summary Stats
• Topic Timeline (Monthly)
• Topic Timeline (Yearly)

	Natural Environment
	2017	2018	2019	2020
Land
Ocean / Sea
Air
Invertebrates
Microbes
Surface Waters / Wetlands
Weather
	Unusual or Unexpected Event
	2017	2018	2019	2020
Erosion
Glacier Change
	Impact on Human Environment
	2017	2018	2019	2020
Sports / Recreation
Human Health
Buildings
Sanitation
Transportation