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> They are the foundation of modern civilisation

This sounds like sentimentality. We've found better ways that costs less and have fewer externalized costs. Consistent electricity at the point of use is indifferentiable as to its source. It matters little if coal got us to this point if other technologies can provide cheaper energy in less environmentally harmful ways going forward.

> and we all get non-economic benefits from the era of unprecedented peace and prosperity that we live in

Prosperity is not at risk with the implementation of renewables and storage. The removal of the health costs of coal-generated air pollution will increase quality of life.

> unprecedented peace

What exactly does coal uniquely offer in terms of supporting peace vs other sources? Also, you are conflating coal with all other fossil fuels when it suits your argument. They are not all the same. Natural gas will continue to have use as a heating fuel for a long time, but the same can't be said of coal. It doesn't have a significant use today beyond producing electricity.

What is at risk are jobs in the already long-declining coal extraction, transport, and combustion industries, and the people in the regions that are dependent on those industries should be helped transition in the near term.

> There are clear and massive positive externalities to fossil fuel, and anyone arguing otherwise needs to take a deep breath. They are the foundation of modern civilisation, and we all get non-economic benefits from the era of unprecedented peace and prosperity that we live in. If we price in all the externalities, fossil fuels probably do deserve a subsidy. The renewables debate is about whether we have an alternative that is better than the historically magical substances we call fossil fuels.

I think you'd have to be pulling a pretty long bow to argue that fossil fuel extraction and use has no environmental externalities - this paper for example (http://insight.jbs.cam.ac.uk/2015/measuring-fossil-fuel-hidd...) shows that for 2008-2012 "the implicit subsidy exceeded post-tax profits (averaged over five years) at all 20 of the largest oil, gas and coal producing companies studied".

We're already (globally) subsidising the fossil fuel industry, I think it's only fair to ask for some of that money back - it's not like they would 'unpollute' the sky and sea if they could anyway.

While they may be the foundation of the modern era, fossil fuels are also a dirty relic that should be left in the past. Leaving aside the environment impact I don't think I'd have to argue so hard that they have a not-so-great legacy when it comes to huge injections of capital into the middle east and it's concomitant propping up of dictators and despotic dynasties.

The ability to derive useful energy from coal is not an externality, it is priced into the sale and consumption of the good.

Just for your benefit, an externality is a cost or benefit that is incurred by a party not involved in a transaction.

Cheap energy generates positive externalities. Obviously I'm not talking about the buyer and the seller of the that energy, I'm talking about the social polity at large. There are positives to having large cheap energy reserves, and those positives are absolutely not priced in to the energy market.

Cheap energy is an enabler that frees resources up for other tasks. It is not a reasonable position for someone to pretend that coal is 'implicitly subsidied' because they've picked up on one negative externality and decided that it should be priced in; the net picture needs to be considered. If we were going to price in all the externalities of having such a cheap and convenient but dirty fuel it might well get an actual subsidy, but that would be silly in its own right. This is one of the major reasons why the pro-renewables crowd has such difficulty convincing anyone to price in the environmental impacts.

Sure, if the debate is had and we all decide that a specific negative externality is to be priced in then I've got no leg to stand on and I'll sing a different tune. But governments so far have implicitly accepted that that negative externality should not be priced in.