Evidence of Climate Change Crossword Puzzle

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QUESTIONS LIST:

phenology: the study of natural cycles and events
glacier: the world _ monitoring service report on melting ice
spring: is occurring 10 days earlier due to global warming
oil tanker: a russian one of these crossed the north pole without help in 2017
erratics: large boulders of alien stone left behind after glaciers retreat
drop stones: evidence of ice ages found in sedimentary rocks
ice free: the us navy predicts the arctic will be this by 2050
pine beetle: north american pest that used to be kept under control by frosty winters
volume: the monitoring service is seeing a reduction in the area and _ of ice on earth
namibian desert: strange location to find evidence of a snowball
ice ages: we have had at least 5 of these glaciations
nasa: conducted a meta-analysis of 29000 changing natural cycles