Comment on "Sustainability Strategy for the Cool Copper Collider", arXiv:2307.04084

TL;DR

This paper critiques a proposed sustainability metric for future Higgs factory colliders, arguing it is flawed and unreliable for guiding sustainable design decisions.

Contribution

It provides a critical analysis of the existing sustainability metric, highlighting its flaws and the limitations of using such metrics for decision-making in collider design.

Findings

The metric is flawed and misrepresents reality.

Using the metric as a multiplicative factor is fragile and unreliable.

The metric is valueless for comparing Higgs factory concepts.

Abstract

The paper entitled "Sustainability Strategy for the Cool Copper Collider" by M. Breidenbach et al. defines a metric to weigh the electricity consumption and the carbon footprint of future Higgs factory concepts. We show that this metric is flawed in many respects and gives an incorrect representation of reality. We also demonstrates that, irrespective of the drawbacks of this particular estimator, the strategy consisting in using a metric as a multiplicative coefficient of the electricity consumption or the carbon footprint of an ensemble of colliders is fragile at best, and valueless when it comes to arguing in favour of or against such or such future Higgs Factory concept.