A recent data roundup by renewable energy industry analyst Paul Gipe shows that variable renewables are meeting much larger percentages of grid power than previously thought possible in some European countries.
Bag taxes/charges as a way to encourage environmentally sound practices. While DC isn't generally a leader in innovative government initiatives, there are three exceptions, and one concerns waste--the passage a couple years ago of a bill requiring a charge of 5 cents for each plastic bag given to a customer for food sales. This has resulted in a serious reduction in the use of plastic bags and a reduction in litter as well.
It’s no secret, unfortunately, that many American downtowns and neighborhoods were disinvested, some severely, over the past several decades. The consequences were devastating, as homes and storefronts were abandoned and once-thriving...
A bit of background: "conservation banking" refers to banking for listed species under the ESA (a backgrounder is available here), whereas habitat credit trading (HCT) refers broadly to voluntary offsetting that seeks to protect imperiled species and habitat. HCT has been in the news a lot recently thanks to interest in incentive mechanisms to protect so-called 'Candidate Species', which may be eligible for listing under the Endangered Species Act but the listing hasn't happened yet.
Arrays of tree-like nanowires consisting of Si trunks and TiO2 branches facilitate solar water-splitting in a fully integrated artificial photosynthesis system
Lawrence Berkeley National Laboratory (Berkeley Lab) scientists have developed the first fully integrated nanosystem for artificial photosynthesis, in which solar energy is directly converted into chemical fuels.
“Similar to the chloroplasts in green plants that carry out photosynthesis, our artificial photosynthetic system is composed of two semiconductor light absorbers, an interfacial layer for charge transport, and spatially separated co-catalysts,” says Peidong Yang, a chemist with Berkeley Lab’s Materials Sciences Division, who led this research.
“To facilitate solar water- splitting in our system, we synthesized tree-like nanowire heterostructures, consisting of silicon trunks and titanium oxide branches. Visually, arrays of these nanostructures very much resemble an artificial forest.
“In natural photosynthesis, the energy of absorbed sunlight produces energized charge-carriers that execute chemical reactions in separate regions of the chloroplast,” Yang says. “We’ve integrated our nanowire nanoscale heterostructure into a functional system that mimics the integration in chloroplasts and provides a conceptual blueprint for better solar-to-fuel conversion efficiencies in the future.”
High-speed rail is still just a dream in America. But why then aren't smart roads a reality?
It is possible to imagine a world in which smart pavement, smart cars, and embedded monitoring and controls would turn highways from gulches that pollute a wide swath of land around them with both particles and noise would become more like rivers.
Mark Vander Meer gives a presentation on soil science as it relates to forestry. I was presenting in another room at the same time, so Mark gave permission to Jocelyn Campbell to record this for me. Once I saw it, I thought it was so good, that I asked Mark if it was okay to put it up on YouTube.