Science in Warfare

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Across
  1. 1. Vesicant gas extensively used during trench warfare (7 letters)
  2. 4. Middle Eastern country targeted with banned neurotoxic agents (5 letters)
  3. 5. Irony of international policy: such weapons remain ___ despite legal bans (6 letters)
  4. 7. Long-lasting biospheric degradation due to toxic exposure (9 letters)
  5. 8. Long-term psychological or physical consequence on non-combatants (9 letters)
Down
  1. 2. Herbicidal warfare program employed for ecological destruction in Southeast Asia (11 letters)
  2. 3. Active Volatile nerve agent inhibiting acetylcholinesterase, deployed in civilian zones (5 letters)
  3. 6. Continent where large-scale chemical warfare was first institutionalized (6 letters)