<Tr> <Td> Final energy productivity (2008--2050) </Td> <Td> 1.6% / year (2008--2014) </Td> <Td_colspan="2"> 2.1% / year (2008--2050) </Td> </Tr> <Tr> <Td> Gross electricity consumption (base year 2008) </Td> <Td> − 4.6% </Td> <Td> − 10% </Td> <Td> − 25% </Td> </Tr> <Tr> <Td> Primary energy consumption in buildings (base year 2008) </Td> <Td> − 14.8% </Td> <Td> </Td> <Td> − 80% </Td> </Tr> <Tr> <Td> Heat consumption in buildings (base year 2008) </Td> <Td> − 12.4% </Td> <Td> − 20% </Td> <Td> </Td> </Tr>

How can machines reduce the amount of energy that is wasted