Danger of cleaning supplies, cold snap coming, our powerful sense of smell: Catch up on the days stories | National & World [Video]

Editor’s Note: CNN’s 5 Things newsletter is your one-stop shop for the latest headlines and fascinating stories to start and end your busy day. Sign up here.

👋 Welcome to 5 Things PM! Finally, it’s fall! Time to break out your sweaters and hoodies. Millions of people across the US will get their first taste of cold weather this week when a surge of Canadian air sends temperatures plunging.

Here’s what else you might have missed during your busy day:

5 things

1️⃣ Chemical concerns: Common household cleaning supplies can be hazardous to your health. The Environmental Working Group found that more than 2,000 products may contain substances linked to problems including asthma, chemical burns and cancer risks.

2️⃣ The nose knows: Your sense of smell may be more powerful than you think.Humans can distinguish odors within a fraction of a second at a level of sensitivity on par with how our brains perceive color, a new study …