Answer:
1. Thorium is more abundant than uranium.
2. Thorium is not so expensive as uranium.
3. Countries without uranium but with thorium reserves have the possibility to build nuclear reactors.
4. Natural thorium has only one isotope; enrichment is not necessary.
5. Thorium can't be used in nuclear weapons.
6. The specific activity of thorium is very low.
7. The physical properties of ThO2 are superior to the properties of UO2.
8. The nuclear properties of thorium are suitable for a nuclear fertile material.