Transboundary Pollution | When Pollution Crosses an International Border — MCQs

All questions with answers and explanations

Read the full set here, or use the practice card above to test yourself one question at a time.

1. Transboundary pollution is best defined as pollution that:

   • Only affects the country where it originates
   • Originates in one State and causes or threatens harm in another State or beyond national jurisdiction (correct answer)
   • Is always caused by nuclear accidents
   • Is regulated exclusively by the Water Act, 1974

   Explanation. Transboundary pollution originates in one State's territory or control and causes or threatens environmental harm in another State or in areas beyond any State's jurisdiction.

2. Which of these is an example of 'diffuse or global' transboundary harm rather than 'point-to-point' harm?

   • Smoke from a border factory drifting into a neighbouring country
   • A river carrying pollutants from an upstream to a downstream country
   • Greenhouse gas emissions contributing to global climate change (correct answer)
   • A truck accident spilling chemicals near a border checkpoint

   Explanation. Greenhouse gases mix into the shared global atmosphere before causing harm, so no single source can be traced to a specific injury in a specific country — this is diffuse/global transboundary harm.

3. The 'no-harm' principle in international environmental law was first authoritatively established by:

   • The Stockholm Declaration, 1972
   • The Trail Smelter Arbitration (1938 & 1941) (correct answer)
   • The Kyoto Protocol, 1997
   • The Paris Agreement, 2016

   Explanation. The Trail Smelter Arbitration between the United States and Canada first held that a State must not allow its territory to be used to cause serious, provable injury to another State's territory.

4. Why do ordinary domestic court remedies usually fail for victims of transboundary pollution?

   • Domestic courts have unlimited jurisdiction over foreign polluters
   • A domestic court's writ or order does not run beyond its own State's borders, and the victim often cannot sue in the polluting country's courts (correct answer)
   • Transboundary pollution is never actually harmful
   • International law prohibits all litigation between citizens of different countries

   Explanation. A domestic court cannot enforce orders against a defendant and assets located entirely in another sovereign State, and foreign victims often lack practical access to the polluting country's courts.

5. The 1986 Chernobyl nuclear disaster is a well-known real-world example of:

   • A purely domestic pollution incident with no international effect
   • Transboundary pollution, where radioactive fallout from one country spread across much of Europe (correct answer)
   • A dispute resolved under the Ramsar Convention
   • An example of the Polluter Pays Principle under Indian law

   Explanation. The Chernobyl accident released a radioactive plume that spread across large parts of Europe within days, illustrating transboundary environmental harm.

6. Transboundary pollution disputes have traditionally been resolved primarily through:

   • Individual lawsuits filed by private victims in the polluting country's courts
   • State-to-State diplomacy, treaties, and international arbitration (correct answer)
   • Criminal prosecution under the Indian Penal Code
   • Automatic compensation paid by the United Nations

   Explanation. Because individual victims typically cannot sue a foreign polluter effectively, transboundary disputes are historically resolved government-to-government, as in Trail Smelter.