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• Topic Timeline (Monthly)
• Topic Timeline (Yearly)

	Natural Environment
	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023	2024
Weather
Land
Ocean / Sea
Surface Waters / Wetlands
Plants / Kelp
Air
Microbes
Marine Mammals
	Unusual or Unexpected Event
	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023	2024
Ice / Snow Change
Seasonal Timing
Glacier Change
Extreme Temperature
Extreme Precipitation
Permafrost Change
Extreme Wind
Erosion
Pollution
Rain on Snow
Flooding / Draining
	Impact on Human Environment
	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023	2024
Buildings
Transportation
Human Health
Sports / Recreation
Energy
Agriculture
Food Security
Sanitation
Water Security
Safety
Economic Impact