Underwater Compressed Air Energy Storage (UW-CAES) — a step beyond underground energy storage in caverns — may soon offer conventional utilities a means of long-duration load shifting for their large-scale electrical grids, and niche microgrid operators a means of reducing their fossil-f
Soil organisms react more sensitive to marketable pesticides when exposed in dry soil and at enhanced temperatures. Both conditions may occur more often in the future due to climate change. Singularly and combined these factors lower the toxicity threshold of fungicides for springtails. The study by ...
Dumping all your bottles, cans, and paper in one recycling bin is convenient, but those materials may end up in a landfill.
Once collected, recyclables are taken to a materials recovery facility (MRF), where they’re sorted either by hand or using expensive, high-tech equipment. From there, the materials go to buyers of scrap glass, paper, metal, and plastic. High-quality glass can be turned into new bottles. High-grade office paper can become new office paper. The higher the quality of the recyclables, the better the process works—and the more cash the recycler gets from the sale.
That’s the problem. Single-source collection usually delivers lower-grade material than recyclables from multiple-bin collection programs. That means the material gets “downcycled” into less valuable products, if it isn’t discarded entirely.
But when a single-stream truck dumps its load out onto the concrete floor of a transfer station, many of the jars and bottles in the load will break. That makes it next to impossible to sort the glass, and that means the broken glass can only be used for lower-grade products, such as roadbed fill.
The same goes for plastic. And if single-stream cities find that their income from scrap sales is declining, those losses cut into the money saved on collection. In many cases, that lowers single-stream’s net cost savings to between 1 and 2 percent. Meanwhile, somewhere between 15 and 27 percent of all single-stream collected recyclables end up in a landfill. That undoes the benefit of more people recycling.
Light is among the fastest growing human-made pollutants of the natural environment. Numbers of outdoor lights are growing rapidly across the world, far outpacing general population growth. We know light…
As dwindling populations of monarch butterflies prepared for their annual migration, two undergraduate students in the William & Mary Plant Ecology Lab spent their summer trying to more deeply understand the plants upon which they rely.
In-between spaces, perceived as frontiers and borders, are the spaces that divide territories within our cities, neighbourhoods and towns. In our minds, they are understood as “non-places”, under-utilised spaces that are often associated with dirty, derelict and unsafe areas of the city.