<Li> Agri - footprint </Li> <Li> Comprehensive Environmental Data Archive (CEDA) </Li> <P> Calculations for impact can then be done by hand, but it is more usual to streamline the process by using software . This can range from a simple spreadsheet, where the user enters the data manually to a fully automated program, where the user is not aware of the source data . </P> <P> Cradle - to - grave is the full Life Cycle Assessment from resource extraction (' cradle') to use phase and disposal phase (' grave'). For example, trees produce paper, which can be recycled into low - energy production cellulose (fiberised paper) insulation, then used as an energy - saving device in the ceiling of a home for 40 years, saving 2,000 times the fossil - fuel energy used in its production . After 40 years the cellulose fibers are replaced and the old fibers are disposed of, possibly incinerated . All inputs and outputs are considered for all the phases of the life cycle . </P>

What are the different types of software which can be used in lca study