Waste in the ponds produced by leaching gold from ore is a source of potential environmental dangers.
Death from Ebola can be another potential environmental danger.
( z1 possible :ARG1 ( z2 endanger :ARG0 ( z3 die :ARG1-of ( z4 cause :ARG0 ( z5 disease :name ( z6 name :op "Ebola" ) ) ) ) :ARG1 ( z7 environment ) :mod ( z8 potential ) :mod ( z9 another ) ) )