In 2004, when I first started following this, modern renewables like wind, solar, and geothermal garnered but .5% of the total energy pie. In 2018, they garner just 1.7%, and are currently growing their “share of the global energy pie” at just .1% per annum, despite wind growing its installed capacity 9.8%, down from 10.8% in 2017, and solar PV growing its capacity 29%, down from 49% in 2016. The demand for energy nearly outstrips all market share gains from the leading renewable technologies.
The International Energy Agency (IEA) also projects that bioenergy will be the largest source of growth in renewable energy over the period 2018 to 2023, not wind and solar PV. Bioenergy will account for 30% of the growth in renewable energy in this period. They forecast that in 2023, bioenergy (excluding the traditional use of biomass like wood and cow dung) will remain the predominant source of renewable energy at 50%. In 2017 – it provided four times the contribution of solar PV and wind combined. Modern bioenergy includes liquid biofuels produced from plants; biogas produced through anaerobic digestion of residues, and wood pellet heating systems.
I find this both surprising and disconcerting. This means we will feed our food, and that of other living creatures, to our machines. It also means we are trying to keep our GHG spewing internal combustion engines (ICE). But, in Nature, there is no such thing as “waste”—that can be converted to fuel—that doesn’t rob food from some other living creature in the web of life and the soil tilth. Not to mention, much of this available biomass is only possible using ancient sunlight energy (fossil fuels) in the form of fertilizers, pesticides, herbicides, and irrigation. We also use fossil fuels to import finite phosphorus and potassium to boost yields. We already appropriate 40% of earth’s biomass to human use. How much more can we take?
