Figure 4.
Projections of ICT's GHG emissions from 2020
(A) Andrae, (B) Belkhir, (C) Malmodin, personal communication. Belkhir and Elmeligi7 judge their exponential scenario as most realistic, while the linear growth scenario is more conservative and reflects the impact of mitigating actions between now and 2040. Malmodin and Lundén8,9 did not make concrete estimates beyond 2020, but Malmodin suggests that ICT's carbon footprint in 2020 could halve by 2030—offering a 2030 estimate of 365 MtCO2e in a recent techUK talk.14