By Richard Smith - System Change not Climate Change, November 26, 2018
I. The IPCC Report “Global Warming of 1.5°C” and the imperative to immediately suppress fossil fuel production
The much-awaited report from the U.N.’s top climate science panel describes the enormous gap between where we are and where we need to be to prevent dangerous levels of global warming. The 2015 Paris climate accord committed industrial nations to reduce their emissions sufficiently to keep global temperatures within a 2°C rise over pre-industrial levels. In the final accord, highly vulnerable island nations and faith communities represented at the UN pressed the authors to include the 1.5°C limit as an aspirational target in the final draft of the accord with 2°C as the backup target.
Soaring GHG emissions over the past five years, rising atmospheric CO2 concentrations, ice-cap retreats, intensified storms, summer forest fires reaching even above the Arctic circle, and die-offs of the world’s coral reefs have all raised concerns about what even a little bit more warming would bring. Parts of the planet including the Arctic and many inland areas, have already warmed beyond 1.5°C. California is on fire most of the year. The worst hurricanes are twice as severe (more precipitation, slower passage, greater wind speeds) as they used to be. This is just a short start. Climate breakdown occurring much more quickly than expected is one reason why climate scientists now think that the goal just five years ago of limiting warming to 2°C “increasingly seems disastrous in this context.”[2] The Paris pledges were never sufficient even to keep warming below 3°C let alone 2°C. Few of the signatories have even managed to meet the low bars they set for themselves and he world’s largest countries including China, the U.S., and Canada have us on track to a 4-5°C warming. As CO2 concentrations continue growing, preventing runaway warming is going to require ever deeper, truly draconian cuts in emissions, which will mean greater economic disruption. IPCC estimates already show us needing to achieve a near vertical drop in emissions in the early 2020s. Every day we delay getting off of fossil fuels increases the probability that we won’t be able to save ourselves.
The 2018 IPCC special report painted a stark portrait of how quickly the planet is heating up and called on governments to take immediate steps to suppress emissions:
If emissions continue at current rate, atmosphere will warm by as much as 2.7° Fahrenheit, or 1.5° Celsius, above preindustrial levels by between 2030 and 2052. Further, warming is more extreme further inland of large water bodies. [To keep temperatures from rising beyond 1.5° degrees] anthropogenic CO2 emissions [must] decline by about 45% worldwide from 2010 levels by 2030 . . . [This] would require rapid and far-reaching transitions in energy, land, urban and infrastructure (including transport and buildings), and industrial systems. . . . These systems transitions are unprecedented in terms of scale . . . and imply deep emissions reductions in all sectors, a wide portfolio of mitigation options and a significant upswing in those options.[3]
Preventing ecological collapse requires transforming the world economy at a speed and scale that “has no documented historic precedent.”[4] What would this take? Myles Allen, Oxford University climate scientist and an author of the report said, “It’s telling us we need to reverse emissions trends and turn the world economy on a dime.” To prevent 2.7 degrees of warming greenhouse emission must be reduced by 45 percent from 2010 levels by 2030, and by 100 percent by 2050. Use of coal as an electricity source would have to drop from 40 percent today to 1-7 percent by 2050.[5] Drew Shindell of Duke University, another author of the report said: “It would be an enormous challenge to keep warming below a threshold” of 1.5 degrees . . . What might that look like? In part, it would include things such as no more gas-powered vehicles, a phaseout of coal-fired power plants and airplanes running on biofuels,” he said. “It’s a drastic change,” he said. “These are huge, huge shifts . . . This would really be an unprecedented rate and magnitude of change.”[6] In response to the report, United Nations Secretary General António Guterres warned world leaders to “Do what the science demands before it’s too late.”[7]