These old power plants produce <e1>pollution</e1> that causes smog, acid rain and global <e2>warming</e2>, and they generate radioactive wastes and other toxic pollutants.
These old power plants
These old power plants produce pollution that causes smog, acid rain and global warming, and they generate radioactive wastes and other toxic pollutants.
<triplet> pollution <subject> warming <object> Cause-Effect(e1,e2)