Sustainable use of ------- resources through careful conservation and proper management is needed.

• natural

• man made

• green

• artificial

---------- of an ecological balance between biotic and abiotic entities is very essential.

• Management

• Maintenance

• Introduction

• Consideration

Reduce, ----------- and reuse are the manthras of 3R approach.

• refresh

• increase

• decrease

• recycle

Narural resources are getting exhausted due to -------- development.

• institutional

• natural

• industrial

• artificial

The world is facing a severe shortage of ---------- for domestic process.

• air

• water

• food

• soft drinks

Many million hectares of ----------- area have been destroyed and deserts are spreading.

• forest

• land

• water

• grassland

Major climatic changes caused due to ------------- activities.

• natural

• artificial

• man-made

• industrial

Resources are valuable materials that are freely available in the environment is called as ---------

• green resources

• food resources

• natural resources

• biological resources

Broadly, the resources are classified into ------ types.

• three

• four

• five

• two

----------------- resources are always available, they can be regenerated and nearly everlasting.

• Renewable energy

• Non-renewable energy

• Food

• Water