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

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

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

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

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

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

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

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

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

--------------------- resources are limited in availability and cannot be regained, if depleted.

-------------- resources, are the sources for the production of oxygen.

--------- is the process of the removal or damage of vegetation in a forest.

------------------ is the chopping and burning a patch of forest land and then growing crops until soil fertility goes down.

--------------- clear a large portion of forest either naturally or due to human activities.

Global warming increase in ------------- content leads to increase in earth's temperature.

In soil erosion, topsoil with ---------- will be lost leading to barren lands.

Landslides occurs normally due to the removal of ---------- on steep slopes, landslides will occur very often.

Chipko movement is --------saving movement by the tribal people of Uttaranchal.

----------- are Temples of modern India.