_____________ is an on site conservation method:-

Which is not included in the parameters of sustainable development:-

Mixture of  gases and  tiny dust particles  in atmosphere  is called:-

First International Conference on environment held on;-

The  re circulation factor  in  a low  rate  trickling  filter is :-

The  process  of  planting  trees ,  in a barren  land  devoid  of  any  trees  to  create  a   forest is  called ;-

When an outside surface  cools  past the  dew point  , frost forms:-

Which  cause Minamata  disease-

Global warming leads to:-

In services output, India is:-

The first of 17th Sustainable Development goals is related to:-

_____________ ecosystems are maintained artificially by man:-

The maximum  BOD  removal  efficiency  of  the  step aeration  process  of  the  activated  sludge  system is ;-

Which  is not  a  greenhouse gas :-

Which is  the largest source for  production of  nitrous oxide ;-

Which layer absorb most of the sun UV radiation;-

The  solar  cell converts  which energy into  electrical  energy ;-

Above  which  Richardson  number does vertical  mixing  in wind  disappear;-

Man and biosphere  programme  is affiliated  with:-

Ozone  layer is present in :-

What does the term  'Liming ' means ;-

Which  is  correct  expression of  the  aeration  period  in hours ;-

Which is  the cause of rising  sludge ;-

How  many  stages  are there  in the  sludge   digestion process :-

What %age of land area should remain covered by forest to maintain ecological balance:-