Environment
Circular cities go ‘green’ by reusing things over and over again
To cut their wastes to nearly zero, circular cities are launching projects to repair, reuse and recycle virtually everything.
HS-ESS3-4
Evaluate or refine a technological solution that reduces impacts of human activities on natural systems.
More Stories in HS-ESS3-4
- Animals
Radioactive animals don’t glow — but do show the power of radiation
Wild species exposed to nuclear contamination help show how radiation affects living things — including its risks to people.
- Health & Medicine
Air pollution might harm children’s eye health
Scientists used machine learning to understand air pollution’s role in eye health and vision. They found children have better eyesight in cleaner air conditions.
- Tech
Let’s learn about lab-grown meat
Lab-grown meat may still be several years away from your local grocery. But such alternatives to farmed or free-range meats are on their way.
- Animals
Save the sharks to save the ocean
Humans have driven sharks and their cousins to the brink of extinction, but it’s not too late to turn the tide. At stake is the health of the entire ocean.
- Environment
More and more, microplastics are collecting in our brains
Over eight years, the mass of microplastics in human brains increased by some 50 percent. There are growing hints that internal microplastics may harm us.
- Chemistry
Some bacteria in wastewater can break down a common plastic
These microbes can break the carbon bonds that make PET plastics so hard to degrade. This type of plastic makes up almost one-third of plastic waste.
- Animals
Giant rat border agents could help put a stop to wildlife poaching
African giant pouched rats have been trained to ferret out elephant ivory, pangolin scales and more. They could be put to work preventing smuggling.
- Climate
Stashing more CO2 in the ocean could slow climate change
More research is needed on ways to safely remove some CO2 from the water to make room for more — such as by seaweed farming and iron fertilization.
- Tech
Bioelectronics research wins top award at 2024 Regeneron ISEF
Three grand-award winners each took home at least $50,000. Hundreds more teens shared more than $9 million in prizes at the international competition.
