Science, Technology, and Public Policy

How can China make good on its pledge to reach carbon neutrality by 2060? In Foundations for a Low-Carbon Energy System in China, a team of experts from China and the United States explains how China's near-term climate and energy policies can affect long-term decarbonization pathways beyond 2030, building the foundations for a smoother and less costly national energy transformation.

David Keith argues that either or both carbon removal or solar geoengineering  is needed to cool the planet this century. There are no other options.

Civil society has played a very important role in nuclear security over the years, and its role could be strengthened in the future. Some nuclear organizations react against the very idea of civil society involvement, thinking of only one societal role—protesting. In fact, however, civil society has played quite a number of critical roles in nuclear security over the years, including highlighting the dangers of nuclear terrorism; providing research and ideas; nudging governments to act; tracking progress and holding governments and operators accountable; educating the public and other stakeholders; promoting dialogue and partnerships; helping with nuclear security implementation; funding initial steps; and more. Funding organizations (both government and non-government) should consider ways to support civil society work and expertise focused on nuclear security in additional countries. Rather than simply protesting and opposing, civil society organizations can help build more effective nuclear security practices around the world.

Realistic, creative vulnerability assessment and testing are critical to finding and fixing nuclear security weaknesses and avoiding over-confidence. Both vulnerability assessment and realistic testing are needed to ensure that nuclear security systems are providing the level of protection required. Systems must be challenged by experts thinking like adversaries, trying to find ways to overcome them. Effective vulnerability assessment and realistic testing are more difficult in the case of insider threats, and special attention is needed. Organizations need to find ways to give people the mission and the incentives to find nuclear security weaknesses and suggest ways they might be fixed. With the right approaches and incentives in place, effective vulnerability assessment and testing can be a key part of achieving and sustaining high levels of nuclear security.

Participants at the final Nuclear Security Summit in 2016 agreed on “action plans” for initiatives they would support by five international organizations and groups—the International Atomic Energy Agency, the Global Initiative to Combat Nuclear Terrorism, INTERPOL, the United Nations, and the Global Partnership Against the Spread of Weapons and Materials of Destruction. These institutions were supposed to play key roles in bolstering ongoing nuclear security cooperation after the summit process ended. The action plans were modest documents, largely endorsing activities already underway, and there have been mixed results in implementing them. To date, these organizations have not filled any substantial part of the role once played by the nuclear security summits.

Nuclear security is never finished. Nuclear security measures for protecting all nuclear weapons, weapons-usable nuclear materials, and facilities whose sabotage could cause disastrous consequences should protect against the full range of plausible threats. It is an ongoing endeavor that requires constant assessment of physical protection operations and reevaluation of potential threats. One of the most challenging areas of nuclear security is how to account for the impact–positive and negative—of non-nuclear emerging technologies. The amended Convention on the Physical Protection of Nuclear Material (amended CPPNM) states it should be reviewed in light of the prevailing situation, and a key part of the prevailing situation is technological evolution. Therefore, the upcoming review conference in 2021, as well as any future review conferences, should examine the security threats and benefits posed by emerging technologies.

In this report, the authors conduct a benchmarking analysis for energy and CO2 emissions intensity of the steel industry among the largest steel-producing countries.

Every day that the EPA quietly ticks off another item, the social and financial consequences are being shifted from polluters to at-risk communities.

Cement production is one of the most energy-intensive and highest carbon dioxide (CO2) emitting manufacturing processes. The goal of this study is to develop a roadmap for decarbonization of California's cement and concrete production. In this study, the authors look at the current status of cement and concrete production in California and develop scenarios up to 2040 to analyze different decarbonization levers that can help to reduce CO2 emissions of cement and concrete production in California.

Deploying coal-bioenergy gasification systems with carbon capture and storage (CBECCS) provides a promising opportunity for China to realize its carbon mitigation and air pollution abatement goals simultaneously. The authors conducted a comprehensive assessment of CBECCS technology for China, with a focus on plant and fuel configurations (e.g., biomass ratios) and economics, as well as CO2 and greenhouse gas emissions and cobenefits for air quality.