Natural Gas to the Rescue (Vaclav Smil)
Vaclav Smil has published a major study Natural Gas in the New Energy World For Naturgy Foundation. Excerpts in italics with my bolds and added images.
Bottom Line: There is an ongoing effort to decarbonize the global energy supply and demand system. This has been a general but slower than currently advertised trend over the past many centuries. While more renewables and greater efficiency to lower fossil fuel usage continues, coal, oil, and natural gas will continue to supply the bulk of the world’s energy for much longer than most probably realize. Make no mistake: the drop in demand and CO2 emissions in 2020 came from a global pandemic, not from a structural decline in the use of fossil fuels. As the cleanest fossil fuel with the lowest CO2 emissions, natural gas in particular has an essential role to play, especially in Asia where it can displace the overdependence on higher emission coal.
While the quest for accelerated decarbonization of the global energy supply has obviously been linked to rising concerns about global climate change, there is nothing new about the process itself.
Histories of modern primary energy and electricity production present
clear trends toward lower carbon intensity.

Energy Sources and the Rise of Civilization. Source: Bill Gates
For example, fuelwood was followed by coal, coal by crude oil and crude oil by natural gas, and as fossil-fueled electricity generation was augmented by hydro and nuclear generation and, most recently, by solar and wind-powered conversions.
This is an ongoing but not a very fast process: half a century ago the world derived about 94% of its primary energy from fossil fuels, by 2020 the share was still about 85%, while 60% of the world’s electricity was still generated in coal- and natural gas-fired stations (crude oil and refined fuels accounted for another 4% of the total).
During the time of the Covid-19 pandemic in 2020, a temporary drop in CO2 emissions resulting from economic lockdowns in the spring months of 2020 was seen by an increasing number of commentators and governments as the beginning of complete decarbonization that would be accomplished in just three decades.
Indeed, wishful thinking should not be mistaken for realistic appraisals.
To begin with, the global decline in energy use has been far lower than initially assumed. The reduction will only slow down the build-up of atmospheric CO2, it will not even interrupt it.
When looking ahead, it is imperative to separate what is possible in the high-income economies from what is required in low-income nations.
Relatively rapid expansion of renewable electricity generation and the pursuit of higher energy efficiencies can (combined with stationary or declining populations) translate into a steady and significant rate of decarbonization in high-income economies.
Even so, it will be impossible to displace all fossil fuels that are now required for heating, transportation and industrial uses by non-carbon alternatives for decades to come.
We simply must remain realistic: Asian and African consumption of fossil fuels is still rising and the developmental aspirations of low-income nations ensure that it will continue to increase in the foreseeable future even with accelerated expansion of renewable electricity generation.
Looking ahead requires at least the basic qualitative and quantitative understanding
of what we are dealing with and where we are coming from.
In the future, expanded consumption of natural gas can make as much of substantial difference in today’s low-income countries as it has made in high-income nations: the fuel is perfectly suited to replace coal in electricity generation (one of the fuel’s largest uses), to power new generation capacities that can operate with unequaled dispatchability and conversion efficiency, to be used more efficiently than any other fuel in a multitude of industrial process, and to provide (for a long time to come) an indispensable feedstock for syntheses of many essential chemicals.
Natural Gas Top Uses

Source: commodity.com/natural gas
The good news is that the global reserves and resource of natural gas is more than
sufficient to encourage a dramatic rise in gas usage around the world.
Findings:
- There is an ongoing effort to decarbonize the global energy supply and demand system.
- This is NOT a new evolution and has repeated itself many times…but the process takes a lot longer than some are claiming today.
- We must be realistic: renewables are growing in importance but will not displace fossil fuels any time soon, measured in decades not years.
- Natural gas has a unique and widening role to play, in the still developing world especially, because it is low-cost, lower emission, abundant, highly versatile and efficient, and very reliable.
Read the full study here.