Fill in the blanks:
1. ........... are resources that exist without action of humankind.
2. ............... resources harvested and used rationally will not produce pollution.
3. The installed capacity of Kamuthi solar power project is ........ MW.
4. Hydro electric power is a ......... resource.
5. ............ is the largest producer of hydroelectricity.
6. ......... is regarded as a symbol of prosperity and a form of wealth.
7. ......... has a wider variety of uses that gold.
