Evaluate or refine a technological solution that reduces impacts of human activities on natural systems.

More Stories in HS-ESS3-4

  1. Environment

    Plastic trash rides ocean currents to the Arctic

    Ocean currents can carry plastic trash far from the cities that shed it. Some plastic debris has made it all of the way to the Arctic Ocean, new data show.

  2. Environment

    Some food-packaging pollutants mess with the thyroid

    Chemical pollutants may hurt the ability of the thyroid gland to make an important hormone. Teens may be most at risk.

  3. Environment

    Keeping space missions from infecting Earth and other worlds

    Scientists are always looking for ways to stop Earthly microbes from polluting other planets. The same goes for bringing bits of other planets back to Earth.

  4. Environment

    Cleaning up water that bees like to drink

    Plant roots suck up pesticides used on soils, then release them into water that can seep from their leaves. This is a sweetened water that bees love to sip. A teen figured out how to remove most of the pesticide with bits of charcoal.

  5. Space

    Student programs computer to predict path of space trash

    People are already using space as a garbage dump, which could prove dangerous to future space travelers. A teen set out to track space junk using only her home computer.

  6. Agriculture

    Teen converts water pollutant into a plant fertilizer

    Too much phosphate can fuel algal growth, which can rob oxygen from the water. This can suffocate fish and other wildlife. Stefan Wan found a way to collect that pollutant, which can later be used as a farm nutrient.

  7. Microbes

    Giant cave crystals may be home to 50,000-year-old microbes

    Microbes trapped in crystals in Mexico's Naica mine may represent some of the most distinct life forms ever found. The microbes have remained dormant for up to 50,000 years.