Screening is a comprehensive and clear method of decision making. It is practical, quick and easy to use. This includes both alternative sites and alternative techniques . This search must be genuine, well documented and carried out before a choice has been made. It is usually the case that alternative sites are available as well as practical although this is not always the case.
Some projects are site specific such as mining.
The extraction can only occur were the mineral is sited. In such cases an EIS is pointless although other measures such as scale, mitigating measures and traffic management are addressed.