The US will shortly be part of the Paris agreement once again. It will therefore be committed to helping keep the rise in the planet’s temperature by the end of this century to no more than 2 degrees Celsius above the levels prior to the industrial revolution. Better still, the rise will be kept at no more than 1.5 degrees.
“A cry for survival comes from the planet itself,” declared Joe Biden in his inaugural address last month. Last week he said that “climate change” was an “existential threat” to humanity. The secretary general of the United Nations (UN), Antonio Gutteres, says the world is headed for a rise of more than 3% this century and that more countries must declare states of emergency until carbon neutrality is reached. Thirty-eight have already declared states of climate emergency.
The next conference of Paris signatories, due to be held in Glasgow in November this year, will probably see demands for countries that have signed up to the Paris accord to commit themselves to more aggressive carbon cuts than the ones they have already promised.
These vary from country to country, as Paris signatories, numbering almost 200, are free to determine their own commitments and timetables, and there can be a big disparity between promises that politicians make in the global spotlight at conferences around the world and the policies they implement back home. The UN’s Intergovernmental Panel on Climate Change (IPCC) has no powers to enforce compliance.
Nor does the IPCC even know the cost of compliance. Two years ago it said that meeting the 1.5 degree target would require the industrial sector to cut carbon emissions by between 67% and 91% by 2050. It conceded that draconian emissions reductions would lead to higher food and energy prices, the latter delaying the transition from biomass (wood and dung) to clean cooking and so damaging the health of people in poorer countries.
But the IPCC also admitted to “knowledge gaps” about the impact this massive contraction in industrial output would have on growth, living standards, and poverty reduction. In the view of Rupert Darwall in a paper published last year by the Global Warming Policy Foundation (GWPF), the IPCC’s attitude is “You must do 1.5 whatever the cost.” “Net zero,” he said, “is being driven by fanatics and zealots who put little value on human welfare.”