3stepIT Sustainability Report 2019 - Page 29



Appendix 1:
Appendix 2:
Carbon & e-waste savings resulting from device reuse
Employment statistics (at 31 December 2019)
Two years ago, we published an EY analysis of how re-using
IT devices improves the sustainability performance of the first
owner. This Appendix updates the analysis using CO2e data
published by several manufacturers for their current range of
devices.
The carbon footprint of any device is caused by several factors
over its lifetime, including its original manufacture, packaging,
shipping, electricity consumption in-use and its end-of-life
disposal.
HP publishes carbon footprint information for many devices.6
Sampling products shipped in 2019 or later, the chart shows a
range of ‘in-use’ contributions to the total life CO2e.
In use CO2e
Total life CO2e (kg)
HP Desktop
40-60%
370-750
HP Notebook
15-30%
210-370
HP Monitor
15-20%
525-725
HP emphasises that these numbers are estimates, taking one
product as an example to illustrate the range. For example, the
HP Engage One Prime All-in-One System has a mean 370 kg
estimated total life CO2e and a standard deviation of 110 kg of
CO2e. It is clear that the way a product is used will affect in use
power consumption. A screen in constant use at full brightness,
for example, will consume far more power than a dim screen
used only occasionally.
Lenovo publishes similar data. The in-use consumption of a
ThinkPad T490 contributes 10% (421kg CO2e) of its total life
carbon footprint, with 4% caused by transportation, less than 1%
from packaging and end of life handling, and 85% by the original
manufacture.
7
The life cycle carbon emissions of the Apple iPhone 11 derive
from production (79%), transport (3%), use (17%), and end-of-life
processing (

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