pollution

Spongebob may want to look into a nanotech upgrade that could permit him to walk on water. Chinese scientists have created carbon nanotube sponges that don't absorb water, leaving them plenty of room for absorbing oil or other icky organic goo.

The new sponges rely upon interconnected carbon nanotubes that naturally repel water, and can absorb 180 times their weight in organic matter. Current sponges used for oil spill cleanups and industrial applications can only absorb up to 20 times their own weight.

Want to wow your neighbors this Saturday with some bright and cheery Fourth of July trvia? Tell them about the dangers of perchlorate, the molecule that helps fireworks burn longer. According to experts at DMD Systems who study explosive materials, the molecules are not only harmful to the environment, but to humans as well–-and repeated exposure poses health risks.

The good news is that scientists are developing new “green” fireworks--as in environmentally sound, not the color--that burn nitrogen-based fuels. They also use less smoke and contain fewer toxins.

The Obama administration is expected to announce that California's strictest-in-the-nation gas mileage and emissions standards will now become a national standard. And surprisingly, U.S. automakers are actually happy.

Over the last few years, knowledge about the effects of rising heat and CO2 levels in the atmosphere on coral reefs, those bizarre, multicultural underwater gardens, has proliferated. One of the newest reports, published this past March, predicts that if atmospheric carbon levels reach double what they are now – 750 parts per million – coral reefs will start to grow so slowly that they won’t keep themselves from dissolving.

Coral has already been dubbed a canary in a coalmine, due to its sensitivity to temperature and acidity, which make it a kind of first warning for the environmental changes wrought by rising global temperature and atmospheric carbon. We dive in to that canary-like sensitivity, and the complex life of a reef, in this new PopSci Comic.

It’s no secret that cleaning up an oil spill is a difficult task. When most of us think of oil spills, we think of incidents like the Exxon Valdez accident, which released more than 10 million gallons of oil into the Prince William Sound in 1989. But what we don’t think about are the more than 200 million gallons of used oil that pollute U.S. wastewater every year after being dumped into sewers, streams and landfills.

An environmental study reports that polarized light from surfaces, such as asphalt and glass buildings, is adversely affecting wildlife behavior.