Today: Businesses are tracking meteorological activity in an effort to keep their sites and infrastructure safe; Rivian faces $100 million hole after Trump relaxes fuel rules; nuclear power is having a pop culture moment.

Welcome back: A small, sleek device—reminiscent of a flashlight—gathered temperature, rainfall and other weather data minute by minute outside Mastercard’s office in Kansas City, Mo., as the region baked during a recent heat wave, WSJ Pro Susutainable Business's Clara Hudson reports.

The unassuming weather station is one of several the company operates around the globe, pulling information in meticulous detail for the credit card giant to track extreme weather. It’s one example of how companies across industries are investing in new ways to closely monitor the effects of climate change on their buildings, employees, operations and supply chains.

Any local weather report could have told company officials that it was blistering hot, but companies are collecting granular and hyperlocal weather conditions, down to the street their offices sits on, as they deal with extreme weather that is growing more common and unpredictable.

“We need to know what the flood risk is for a building in London, not the City of London,” said Ellen Jackowski, chief sustainability officer at Mastercard. “We wanted it to be latitude- and longitude-specific.”

• The Future of Weather Forecasting Is Hyperlocal
• Weather Service Enters Hurricane Season With Cuts to Staff
• Feeling Especially Sticky This Summer? There’s a Metric for That

Electric-vehicle maker Rivian says the rollback of fuel economy rules in the U.S. is holding up $100 million of revenue, a sign of how changes to automotive policy under the Trump administration are starting to hurt the EV industry, the WSJ's Ryan Felton and Sharon Terlep report. 

Rivian and its rivals have generated hundreds of millions of dollars selling credits tied to fuel-economy rules. But after the Trump administration removed penalties for violating those standards, the nation’s top automotive regulator stopped issuing paperwork necessary to finalize those credits, leaving EV makers in the lurch.

The National Highway Traffic Safety Administration said the change was part of moves to overturn Biden-era EV rules and address Corporate Average Fuel Economy standards, known as CAFE. Last week, however, an EV trade group filed a petition to the U.S. Court of Appeals in Washington, D.C., asking the court to intercede. 

The dispute highlights the practice of buying and selling of so-called regulatory credits. Revenue from these credits has been a reliable stream for EV makers and a hefty expense for legacy carmakers whose fleets contain gas-guzzling pickups and SUVs.

• Trump’s Megabill 'Gives Chinese EV Makers a Leg Up'
• I Really Like Electric Cars. This Tech Would Make Me Love Them.
• GM Will Import EV Batteries From China’s CATL Despite Tariffs

When fashion model Isabelle Boemeke started posting TikToks about nuclear power in 2020, her friends were baffled. One of her booking agents said she would wreck her career by touting something so controversial, the WSJ's Jennifer Hiller reports.

Later, she helped organize protests to keep California’s Diablo Canyon Power Plant operating and gave a TED Talk on nuclear power that has been viewed more than 1.8 million times. Boemeke’s TikTok on a natural nuclear reactor—which happened in a uranium deposit in Africa—got 38,000 likes.

What seemed a bit out-there in 2020 has become mainstream. Nuclear energy is having a moment in both pop culture and politics for the first time in decades, thanks in part to a new wave of activists like Boemeke.

About 60% of Americans support the construction of more nuclear plants, according to the Pew Research Center. That’s a significant shift from 2020, when 43% said they supported more power generation from atomic energy.

• The New Face of Nuclear Energy Is Miss America
• The Audacious Reboot of America’s Nuclear Energy Program
• Trump Wants to Expand Nuclear Power. It Won’t Be Easy.

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• The chocolate company where prices change every three months. (WSJ)
   
• Google to invest $9 billion in cloud and AI infrastructure in Oklahoma. (DCD)
   
• One weird trick to build new data centers without breaking the grid. (Heatmap)
   
• Foodtech startup prefer raises $4.2 million to scale low carbon coffee, cocoa alternatives. (ESG Today)
   
• Trump administration to unveil tougher solar and wind subsidy rules. (Reuters)
   
• New carbon credits put focus on electronics recycling and reuse. (Trellis)
   
• Is the world’s green hydrogen dream fizzling out?. (Bloomberg)
   
• U.N. plastics treaty talks in disarray after petrostates block progress. (FT)
   
• Juneau avoids disastrous glacier flood. (WSJ)

WSJ Pro Sustainable Business gives you an inside look at how companies are tackling sustainability. Send comments to bureau chief Perry Cleveland-Peck at perry.cleveland-peck@wsj.com and reporters Clara Hudson at clara.hudson@wsj.com and Yusuf Khan at yusuf.khan@wsj.com. Follow us on LinkedIn at wsjperry, clara-hudson and yusuf_khan.