Fill in the blank with appropriate words.
(i) Intially 25 biodiversity hotspots were identified but subsequently………. More have been added to the list.
(ii) Strict protection to biodiversity hotspots could reduce the ongoing mass extinction by almost.........
(iii) India has............. biosphere reserves......... national parks and .......... wildlife sanctuaries.
(iv) The........... on sustainable development held in 2002 in Johannesburg 190 countries pledged their commitment achieve by 2010.