In this way, the interactions can be filtered according to the specificity of the biological system being studied.
Emissions of smog-forming pollutants can be filtered by catalytic converters.
They can be filtered by algorithms, untouched by human tongue; they can be rendered graphical and made to dance.
While smog-forming pollutants can be filtered by devices like catalytic converters, no such filter exists for carbon dioxide.
If the Arts Council invests, the funding can be filtered productively towards publicity.
The results can be filtered by price range, hotel class and reviews by Google users.
Water from rivers, ponds, puddles and rainwater can be filtered through the system and safely drunk.
Results can be filtered, and users can arrange a session for a €5-10 ($6.50-13) booking fee.
If an image has a high skin-color ratio, it is either deleted or flagged so that it can be filtered by the searchers themselves.
The interrogations produce a 24-hour stream of information that can be filtered and sent to the battlefield.
But the chief sticking point is simply that carbon dioxide -- unlike more familiar forms of pollution, which can be filtered -- is for the moment an unavoidable byproduct of burning fuels, particularly fossil fuels, and especially the biggest source, coal.
