EIA | SEA |
For projects | For policies, plans and programmes |
Takes place at the end of decision-making cycle | Takes place at earlier stages of decision-making cycle |
Reactive approach to development proposal | Pro-active approach to developmental proposals |
Identifies specific impacts on the environment | Identifies environmental implications on issues of sustainable development |
Assess the effect of a proposed development on the environment | Assess the effect of the environment on development needs and opportunities |
Considers limited number of feasible alternatives | Considers broad range of potential alternatives |
Treats symptoms of environmental deterioration | Pursues the roots of environmental impacts |
Limited review of cumulative effects | Early warning of cumulative impacts |
Emphasis on mitigating and minimizing impacts | Emphasis on meeting environmental impacts objectives, maintaining natural systems |
Narrow perspective, high level of detail | Broad perspective, lower level of detail to provide a vision and overall framework |
Well-defined process, clear beginning and end | Multi-stage process, overlapping components, policy level is continuing iterative |
Focuses on standard agenda, treats symptoms of environmental deterioration | Focuses on sustainability agenda, gets at sources of environmental deterioration |
Responsibility and finance of proponent | Responsibility and finance of the government |