Environmentalists say HFO produces higher emissions of harmful pollutants, including sulphur oxide, nitrogen oxides, and black carbon. Absolutely true. And that, to me as a security person, spells trouble. The security ones as well. Please make sure your browser supports JavaScript and cookies and that you are not blocking them from loading.
This passage is completed with certainty.
( z0 complete :ARG1 ( z1 passage :mod ( z2 this ) ) :manner ( z3 certain ) )
(z0 / complete-01
    :ARG1 (z1 / passage
              :mod (z2 / this))
    :manner (z3 / certain))
This passage is completed with certainty .
z1 :mod z2
z0 :ARG1 z1
z0 :manner z3