and is reproduced here as part of the Climate Desk collaboration.
Researchers have long debated what the 10-foot-long tooth that erupts from a narwhal’s head is actually
for. Perhaps it has something to do with sexual selection, and males with longer horns attract more females. Or maybe the things sense salinity. Or perhaps a narwhal uses its tusk to flush out prey on the ocean bottom.
Whatever the purpose, scientists know this for certain: The Arctic region, which the narwhals call home, is warming twice as fast as the rest of the planet, and by analyzing these tusks, researchers can glean surprisingly detailed insights into how the animals are dealing with catastrophic change. It’s not looking good.
Canada is touting hydrogen as crucial to its climate action plan, but how green is it?
In this week s issue of our environment newsletter, we look at Canada s pursuit of green hydrogen and California s findings on the connection between carbon emissions reductions and GDP.
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This week:
California increases GDP while decreasing emissions
Scientists uncover traces of climate history by cracking open narwhal tusks
Arctic Climate Change and Fossil Fuel Pollution is Altering Narwhal Tusks – Veterans Today | Military Foreign Affairs Policy Journal for Clandestine Services veteranstoday.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from veteranstoday.com Daily Mail and Mail on Sunday newspapers.
Posted: Apr 03, 2021 6:00 AM CT | Last Updated: April 3
A new study examines the layers of bone in a narwhal s tusk for clues to gradual shifts in their health, environment and behaviour over decades. (Paul Nicklen/WWF)