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  1. Environment

    Is Drano Bad for the Environment? Yes, Here’s Why

    Drano’s harsh chemicals can harm aquatic life and survive wastewater treatment. Here’s what’s in it and some gentler alternatives worth trying.

    By Xiaoyan Chen
  2. Environment

    What Does Red Mold Look Like? Colors and Health Risks

    Red mold ranges from pink to deep crimson and can grow on walls, food, and more. Learn what it looks like, when it’s harmful, and how to deal with it.

    By Jorge Medina
  3. Chemistry

    Why Does Benzoyl Peroxide Bleach Fabrics and Hair?

    Benzoyl peroxide bleaches towels and pillowcases through an oxidation reaction. Here’s why it happens and how to protect your fabrics.

    By Kavya Kulkarni
  4. Chemistry

    What Is Germall Plus: Ingredients, Uses & Safety

    Germall Plus is a widely used cosmetic preservative. Learn what’s in it, how it works, and what the safety research says.

    By Steven Kagan
  5. Environment

    What Does Black Mold Smell Like? Musty, Earthy Odors

    Black mold has a distinct musty, earthy odor caused by microbial compounds. Learn what it smells like, how it differs from mildew, and where hidden mold hides.

    By Wesley Cooper
  6. Environment

    What Is AQS? EPA’s Air Quality System Explained

    Learn how the EPA’s Air Quality System collects and shares pollution data, and why it’s useful for understanding the air you breathe.

    By Tara James
  7. Environment

    Is Mold on Floor Joists Dangerous? Signs & Risks

    Mold on floor joists can affect your air quality and home’s structure. Learn what’s actually risky, when to DIY, and how to keep it from coming back.

    By Stephen Marsh
  8. Environment

    How To Dispose Of Contaminated Soil

    Learn how to safely dispose of contaminated soil, from testing and classification to choosing the right treatment method and understanding your legal responsibilities.

    By Xiaoyan Chen
  9. Environment

    Is OxiClean Safe for the Environment? An Honest Look

    OxiClean breaks down into water and soda ash, but its environmental impact isn’t so clean-cut. Here’s what you should know before using it.

    By Mai Luong
  10. Environment

    Water Bottle Smells Like Rotten Eggs: Causes & Fixes

    That rotten egg smell in your water bottle is usually bacteria or sulfur buildup. Here’s what causes it and how to get rid of it for good.

    By Jodie Waters
  11. Biology

    Is Blood Dirty? What Science Actually Says

    Blood gets called “dirty” a lot, but science tells a different story. Here’s what blood actually contains and when it can genuinely pose a risk.

    By Isabel Soto
  12. Physics

    How Does Fitbit Calculate Floors? Altimeter Explained

    Fitbit uses a barometric altimeter to count floors, not steps. Learn how it works, why stair machines don’t count, and how to improve accuracy.

    By Drew M. Willis
  13. Physics

    Is Smoke Vapor? How They Differ and Why It Matters

    Smoke and vapor aren’t the same thing, and the difference has real consequences for your lungs and health.

    By Nikolai Olsen
  14. Environment

    Is an Air Purifier Good for Mold in Your Home?

    Air purifiers can capture mold spores, but they won’t fix a mold problem. Learn what they actually do, which technologies work best, and why a dehumidifier may matter more.

    By Stephen Marsh