The government frequently asks companies to close one of these inefficient, heavily polluting operations and provide jobs or money to the workers before allowing the construction of a new coal-fired plant.
SACS, on the other hand, by combining distance with recency and frequency, is able to handle cache pollution efficiently, without compromising the performance of the cache during standard (non polluted) operation.
While progressive companies are steadily improving their transparency, there will also be millions of irresponsible companies trying to fly under the radar of regulation and public scrutiny, running polluting operations that expolot cheap labour and abuse human rights.
Authorities routinely pledge to close down polluting industrial operations but often back down because of their importance to the local economy.
Across America, hundreds of other cities choke in the shadow of dangerous, polluting oil operations.
Tells about, the Ford administration's efforts to encourage the production of synthetic fuels here, despite the fact that the liquification of coal, for example, is an expensive and air-polluting operation.
Practices are activities aimed at keeping an operation from polluting.
Wastewater treatment plants are revamping themselves as resource recovery operations, saving and even producing energy and polluting less in the process.
Nearby outdoor air is also polluted by normal operation of these units.
To successfully exploit promising shale formations, for instance, energy firms must insert many wells, since each fracking operation can only extend several hundred feet in any direction, requiring the establishment of noisy, polluting, and potentially hazardous drilling operations in well-populated rural and suburban areas.
In 2008, after mining operations polluted the water supply in San Sebastián, sparking a clean water crisis, then-president Antonio Saca stopped issuing new mining permits.
