The phenomenon of "urban heat islands" refers to:

Ecological niche refers to

With reference to India, Didwana, Kuchaman, Sargol and Khatu are the names of :

The "Agenda - 21" of Rio Summit, 1992 is related to -

The Himalayan range is very rich in species diversity. Which one among the following is the most appropriate reason for this phenomenon?

In ecological terms, 'Ecotone' refers to: