Apply scientific principles to design a method for monitoring and minimizing a human impact on the environment.

  1. Environment

    Soot fouls subway stations — and maybe lungs

    Soot levels in stations for New York City’s electric subway trains exceed the levels outdoors, a new study finds. The underground source of this black carbon: maintenance trains that share the tracks with subway trains. Breathing soot can aggravate asthma and other lung disease.

  2. Environment

    Nano air pollutants strike a blow to the brain

    Most people think that air pollution poses the biggest risk to our lungs. In fact, pollution hits the brain too, sometimes by traveling a direct route — through our noses. These tiny pollutants can harm IQ and more.

  3. Environment

    Thirdhand smoke poses lingering danger

    The pollutants in cigarette smoke can linger indoors for hours. Indeed, they may pose risks long after any visible smoke is gone.

  4. Animals

    Scientists seek bat detectives

    Bats emit high-pitched calls in the night to find their way around. A citizen science project is eavesdropping on these calls to probe the health of ecosystems.

  5. Climate

    World leaders call for action on climate change

    This week, the presidents of China and the United States pledged to take aggressive action on the release of greenhouse gases to head off dire worldwide climate effects.

  6. Food can make an appetizing science fair project

    Many students think they need a laboratory or special equipment for a winning research project. But finalists at the Broadcom MASTERS competition showed food-based research may require little more than your home kitchen

  7. Earth

    Coming: The sixth mass extinction?

    Species are dying off at such a rapid rate — faster than at any other time in human existence — that many resources on which we depend may disappear.

  8. Microbes

    Recycling the dead

    When things die, nature breaks them down through a process we know as rot. Without it, none of us would be here. Now, scientists are trying to better understand it so that they can use rot — preserving its role in feeding all living things.

  9. Chemistry

    Chemistry: Green and clean

    “Green” means environmentally friendly and sustainable. Green chemistry creates products and processes that are safer and cleaner — from the start.

  10. Earth

    Mailing off my microbeads

    I was shocked to find out that my face wash contains plastics that might possibly harm marine creatures. So I’m donating it to science.

  11. Animals

    Salted butterflies

    The salt used on winter ice can alter the bodies of summer's butterflies. Males develop larger muscles and females get bigger brains.

  12. Animals

    Teen studies water strider disappearing act

    As a child, Xidian Zhang loved to play with water striders. Now they’re gone, and pollution may be the reason. This teen’s findings earned him a spot at the 2014 Intel International Science and Engineering Fair.