what's will all the negative waves baby---donald sutherland "kelly's heroes"
TGT BOOKWORM RON RICK get behind progress PLEASE...like my dad used to say don't give me more reasons why you can't do something instead give me one reason why you CAN DO SOMETHING (go SOLAR, GEOTHERMAL, TIDAL, WIND, ALGEA---ANYTHING BUT FOSSIL FUEL----FOR OUR FUTURE!!!!)
A smog-eating street in the Netherlands: Dirty air, beware! (Photo: Science Direct/Los Angeles Times)
The eco-makeover of urban surfaces continues. First came white roofs. Then so-called cool pavement. And now smog-eating concrete.
Yup, sidewalks with a taste for filthy air.
Eindhoven University of Technology scientists have installed air-purifying cement onto a city block in Hengelo, Netherlands, and published the results, which found that it reduced nitrogen oxide air pollution up to 45 percent in ideal weather conditions. This is an average reduction of 19 percent each day.
The concrete, dubbed “photocatalytic,” is made with run-of-the-mill cement sprayed with a chemical—titanium oxide—that neutralizes air pollutants, the researchers’ abstract states.
“[The concrete] could be a very feasible solution for inner city areas where they have a problem with air pollution,” said researcher Jos Brouwers in 2010 to CNN, when the pavement was in its early stages.
So, what’s the world waiting for? Why aren’t urban jungles with smog problems—we’re especially looking at you, Beijing—not jackhammering every piece of old-school pavement and pouring the new stuff?
Well, like most public work projects, it all comes down to cost. Titanium dioxide pavement is simply more expensive than your grandfather’s cement.
But, with further product tinkering and price–reduction, air-scrubbing pavement could be the stomping ground of the future.
I think I've probably posted this video before. However, I really like it so I'm going to post it here as well. It provides a bit of perspective on energy use, as well as a one potential solution. Basically, using PVs to split water (for storage as molecular hydrogen and oxygen) so that it can be recombined later with a fuel cell.
His group has nearly solved one part of this overall "equation" to make this a viable option. More research needs to be done into safe, long term hydrogen storage, as well as more efficient fuel cells.
Discalimer: Don't be turned off by Professor Nocera's slightly condescending demeanor; its a little annoying. However, his message is pretty powerful.
"Based on our findings, there are no technological or economic barriers to converting the entire world to clean, renewable energy sources," said Jacobson, a professor of civil and environmental engineering. "It is a question of whether we have the societal and political will."