With such cooperation in mind, let's review the basics on how those two countries affect world energy consumption and global carbon emissions: the United States and China are the world's two leading consumers of energy and its two main emitters of carbon dioxide, or CO2, the leading greenhouse gas. As a result, they exert an outsized influence on the global climate equation. According to the International Energy Agency (IEA), China accounted for approximately 22% of world energy consumption in 2018; the U.S., 16%. And because both countries rely so heavily on fossil fuels for energy generation China largely on coal, the U.S. more on oil and natural gas their carbon-dioxide emissions account for an even larger share of the global total: China alone, nearly 29% in 2018; the U.S., 18%; and combined, an astonishing 46%.
It's what will happen in the future, though, that really matters. If the world is to keep global temperatures from rising above that 1.5 degrees Celsius threshold, every major economy should soon be on a downward-trending trajectory in terms of both fossil-fuel consumption and CO2 emissions (along with a compensating increase in renewable energy output). Horrifyingly enough, however, on their current trajectories, over the next two decades the combined fossil-fuel consumption and carbon emissions of China and the United States are still expected to rise, not fall, before stabilizing in the 2040s at a level far above net zero. According to the IEA, if the two countries stick to anything like their current courses, their combined fossil-fuel consumption would be approximately 17% higher in 2040 than in 2018, even if their CO2 emissions would rise by "only" 3%. Any increase of that kind over the next two decades would spell one simple word for humanity: D-O-O-M.
True, both countries are expected to substantially increase their investment in renewable energy during the next 20 years, even as places like India are expected to account for an ever-increasing share of global energy use and CO2 emissions. Still, as long as Beijing and Washington continue to lead the world in both categories, any effort to achieve net-zero and avert an almost unimaginable climate cataclysm will have to fall largely on their shoulders. This would, however, require a colossal reduction in fossil-fuel consumption and the ramping up of renewables on a scale unlike any engineering project this planet has ever seen.
The Institute of Climate Change and Sustainable Development at Tsinghua University, an influential Chinese think tank, has calculated what might be involved in reshaping China's coal-dependent electrical power system to reach the goal of a 1.5-degree limit on global warming. Its researchers believe that, over the next three decades, this would require adding the equivalent of three times current global wind power capacity and four times that of solar power at the cost of approximately $20 trillion.
A similar transformation will be required in the United States, although with some differences: while this country relies far less on coal than China to generate electricity, it relies more on natural gas (a less potent emitter of CO2, but a fossil fuel nonetheless) and its electrical grid as recent events in Texas have demonstrated is woefully unprepared for climate change and will have to be substantially rebuilt at enormous cost.
And that represents only part of what needs to be done to avert planetary catastrophe. To eliminate carbon emissions from oil-powered vehicles, both countries will have to replace their entire fleets of cars, vans, trucks, and buses with electric-powered ones and develop alternative fuels for their trains, planes, and ships an undertaking of equal magnitude and expense.
There are two ways all of this can be done: separately or together. Each country could devise its own blueprint for such a transition, developing its own green technologies and seeking financing wherever it could be found. As in the fight over fifth generation (5G) telecommunications, each could deny scientific knowledge and technical know-how to its rival and insist that allies buy only its equipment, whether or not it best suits their purposes a stance taken by the Trump administration with respect to the Chinese company Huawei's 5G wireless technology. Alternatively, the U.S. and China could cooperate in developing green technologies, share information and know-how, and work together in disseminating them around the world.
On the question of which approach is more likely to achieve success, the answer is too obvious to belabor. Only those prepared to risk civilization's survival would choose the former and yet that's the choice that both sides may indeed make.
Why a New Cold War Precludes Climate Salvation
Those in Washington who favor a tougher approach toward China and the bolstering of U.S. military forces in the Pacific claim that, under President Xi Jinping, the Chinese Communist regime has become more authoritarian at home and more aggressive abroad, endangering key U.S. allies in the Pacific and threatening our vital interests. Certainly, when it comes to the increasing repression of Uighur Muslims in Xinjiang Province or pro-democracy activists in Hong Kong, there can be little doubt of Beijing's perfidy, though on other issues, there's room for debate. On another subject, though, there really should be no room for debate at all: the impact of a new cold war between the planet's two great powers on the chances for a successful global response to a rapidly warming planet.
There are several obvious reasons for this. First, increased hostility will ensure a competitive rather than collaborative search for vital solutions, resulting in wasted resources, inadequate financing, duplicative research, and the stalled international dissemination of advanced green technologies. A hint of such a future lies in the competitive rather than collaborative development of vaccines for Covid-19 and their distressingly chaotic distribution to Africa and the rest of the developing world, ensuring that the pandemic will have a life into 2022 or 2023 with an ever-rising death toll.
Second, a new cold war will make international diplomacy more difficult when it comes to ensuring worldwide compliance with the Paris climate agreement. Consider it a key lesson for the future that cooperation between President Barack Obama and Xi Jinping made the agreement possible in the first place, creating pressure on reluctant but vital powers like India and Russia to join as well. Once President Trump pulled the U.S. out of the agreement, that space evaporated and global adherence withered. Only by recreating such a U.S.-China climate alliance will it be possible to corral other key players into full compliance. As suggested recently by Todd Stern, the lead American negotiator at the 2015 Paris climate summit, "There is simply no way to contain climate change worldwide without full-throttle engagement by both countries."
A cold war environment would make such cooperation a fantasy.
Third, such an atmosphere would ensure a massive increase in military expenditures on both sides, sopping up funds needed for the transition to a green-energy economy. In addition, as the pace of militarization accelerated, fossil-fuel use would undoubtedly increase, as the governments of both countries favored the mass production of gas-guzzling tanks, bombers, and warships.
Finally, there is no reason to assume a cold war will always remain cold. The current standoff between the U.S. and China in the Pacific is different from the one that existed between the U.S. and the Soviet Union in Europe during the historic Cold War. There is no longer anything like an "Iron Curtain" to define the boundaries between the two sides or keep their military forces from colliding with each another. While the risk of war in Europe was ever-present back then, each side knew that such a boundary-crossing assault might trigger a nuclear exchange and so prove suicidal. Today, however, the air and naval forces of China and the U.S. are constantly intermingling in the East and South China Seas, making a clash or collision possible at any time. So far, cooler heads have prevailed, preventing such encounters from sparking armed violence, but as tensions mount, a hot war between the U.S. and China cannot be ruled out.
Because American forces are poised to strike at vital targets on the Chinese mainland, it's impossible to preclude China's use of nuclear weapons or, if preparations for such use are detected, a preemptive U.S. nuclear strike. Any full-scale thermonuclear conflagration resulting from that would probably cause a nuclear winter and the death of billions of people, making the climate-change peril moot. But even if nuclear weapons are not employed, a war between the two powers could result in immense destruction in China's industrial heartland and to such key U.S. allies as Japan and South Korea. Fires ignited in the course of battle would, of course, add additional carbon to the atmosphere, while the subsequent breakdown in global economic activity would postpone by years any transition to a green economy.
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