The major cause of pollution is:

Medium size animals like ________ urial, Barking Deer, Goral and Chinkara and Parridges – Grey, Black, Seesee and Chakor are supported in these habitats:

In 1970, several people died in Japan due to pollution of:

Grasslands are:

In a stabilized ecosystem the P/R ratio is:

Green-house effect is due to the presence of: