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Good afternoon, and welcome to Globe Climate, a newsletter about climate change, environment and resources in Canada.

We are two weeks away from the federal election. Have you taken the time to familiarize yourself with what you need to know? If not, we’ve got you.

Whether you need to know what you missed on the campaign trail or to simply get answers on how to vote, we have it all. You can also listen to our most recent politics podcast and sign up for our politics newsletter.

Now, let’s catch you up on other news.

1. Pollution: Keystone oil pipeline shut down after rupture in rural North Dakota, owner South Bow confirms
2. Investing: Scotiabank CEO says Canada needs to boost investment in energy infrastructure
3. Listen to the Decibel: What happened to the ‘carbon tax election’?
4. Space: Atmospheric researchers have bid farewell to what may be the longest running space science experiment in Canadian history.
5. On the ground with The Narwhal: A deadly disease is killing millions of bats. Now Trump funding cuts threaten a promising Canadian treatment

For this week’s deeper dive, we’re taking a closer look at the second story in a series on Canada-U.S. cross-border measures to protect North Atlantic right whales.

Off the tip of Cape Cod, on the bay side of the national shoreline, a North Atlantic right whale and her four-month-old calf swim in a synchronized dance. The mother’s name is Nauset, after a local lighthouse, because of the shape of the white marking on her skin.

Nauset is one of the most crucial members of her species. With fewer than 70 reproductively active females remaining in a population of 370 whales, scientists consider these mothers the key to the species’ survival.

Since 2017, North Atlantic right whales have been caught in what the U.S. National Marine Fisheries Service of the National Oceanic and Atmospheric Administration calls an “Unusual Mortality Event.” More than 20 per cent of the population is sick, injured or has been killed. Plus, stressors such as entanglements, vessel strikes, declining prey and ocean noise have disrupted their birthing cycle.

Scientists warn that if the loss of six to seven breeding females a year continues, the number of reproductive females will soon drop below the quasi-extinction threshold of 50 individuals – a tipping point from which recovery may be impossible.

Nauset and her newest calf have already defied extraordinary odds. Their journey together began hundreds of kilometres away, in the calving grounds off the coast of Georgia. By reaching Cape Cod Bay they have arrived in one of the few refuges where, for a short time, they can enjoy relative safety. For the next leg of their migration they will go as far north as the Gulf of St. Lawrence.

Travelling north, the whales navigate threats from ship strikes; entanglements in fishing gear; climate change, which is altering their migratory patterns and feeding areas; and ocean noise, which can affect their ability to communicate.

Efforts to reduce human-caused mortality – which the NOAA Fisheries reports as the only solution to save North Atlantic right whales – are under way on both sides of the Canada-U.S. border.

Read the full story from Jenn Thornhill Verma today.

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