The Natural Resources Defense Council released a map today revealing that around 127 million U.S. citizens live in areas susceptible to air quality issues (such as pollen and ozone pollution) caused by climate change.

Pollen and pollution levels are increasing due to "increasing temperatures and sunlight," as well as longer warm seasons, according to the NRDC.

The states with highest percentages of people "living in counties with both unhealthy ozone days and pollen-producing ragweed" include: D.C., Connecticut, Massachusetts, Maine, New York, Ohio, Pennsylvania, Wisconsin, Michigan, Illinois, Virginia, Colorado, Utah, and Missouri among others.

Why it matters: ragweed and ozone pollution can worsen respiratory problems like asthma and allergies, forcing people to take more sick days.

"Climate change is going to make it more difficult for people who struggle with respiratory illness to stay healthy." - NRDC

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Updated 9 mins ago - Politics & Policy

Coronavirus dashboard

Illustration: Sarah Grillo/Axios

  1. Global: Total confirmed cases as of 8:30 p.m. ET: 30,911,999 — Total deaths: 959,059— Total recoveries: 21,147,903Map.
  2. U.S.: Total confirmed cases as of 8:30p.m. ET: 6,796,384 — Total deaths: 199,474 — Total recoveries: 2,590,671 — Total tests: 95,108,559Map.
  3. Politics: Testing czar on Trump's CDC contradictions: "Everybody is right" Ex-FDA chief: Career scientists won't be "easily cowed" by political vaccine pressure.
  4. Education: What we overlooked in the switch to remote learning.
  5. Health: The dwindling chances of eliminating COVID-19 — 7 states set single-day coronavirus case records last week.
  6. World: England sets £10,000 fine for breaking self-isolation rules — The countries painting their pandemic recoveries green.

Arrest over letter to Trump containing poison ricin

President Trump returning to the White House from Minnesota on Sept. 18. Photo: Win McNamee/Getty Images

A suspect was arrested for allegedly "sending a suspicious letter" after law enforcement agents intercepted an envelope addressed to President Trump containing the poison ricin, the FBI confirmed in an emailed statement to Axios Sunday.

Details: The suspect, a woman, was arrested while trying to enter New York from Canada, law enforcement forces said.

Trump campaign goes all in on Pennsylvania

Trump poster in Scranton, Pennsylvania. Photo: Robert Nickelsberg/Getty Images

The president's campaign is placing more importance on Pennsylvania amid growing concern that his chances of clinching Wisconsin are slipping, Trump campaign sources tell Axios.

Driving the news: Pennsylvania, which has 20 electoral votes, twice Wisconsin's number, actually has been trending higher in recent public and internal polling, a welcome development for the campaign.