1) It should be undertaken at project level but it is undertaken at policy and planning level.
2) Project alternatives are limited.
3) There is lack of comprehensive environment information base, limitation of time, manpower and finances.
4) Making process along with traditional economic and technical factors, EIA requires the scientific and value issues to be deal with in a single assessment process.
5) Alternatively predicted adverse effect on the environment might lead to strict conditions of being imposed to avoid.