Science & Technology

Direct air capture (DAC) is a type of technology that captures carbon dioxide directly from the air. As the negative impacts of climate change become ever more apparent, governments and private industries have funneled increasing support toward DAC as a critical pathway toward achieving a net-zero future. Although a promising technology, wide-scale deployment of DAC faces several significant challenges.

Joseph Nye writes that even at this early stage, there are at least eight lessons— some old, some new— that the world is learning (or relearning) from the war in Ukraine.

Will China succeed in what some call its grand strategy of displacing American power? Whichever scenario emerges also depends on the strategy the US chooses in response, rites Joseph Nye.

Joseph Nye argues that prudence results from the fear of creating unintended consequences in unpredictable systems and can develop into a norm of nonuse or limited use of certain weapons or a norm of limiting targets. Something like this happened with nuclear weapons when the superpowers came close to the brink of nuclear war in 1962, during the Cuban missile crisis. The Limited Test Ban Treaty followed a year later.

In the wake of a series of damaging cyber intrusions on private businesses controlling critical pieces of U.S. infrastructure, Harvard Kennedy School Senior Lecturer Juliette Kayyem says that countering the growing threat will require erasing the "legal fiction" that cyberattacks are different than physical attacks on American civilians.

In this policy brief, we consider the existing mechanism of tax credits. We see how they can encourage private sector risk-taking to enable research and development (R&D) outcomes. However, our goal is to go beyond economic growth benefits, and to include the less tangible considerations of public good and public purpose in the research and development domain. We then suggest an expansion of tax credits focused on supporting the researchers involved in the R&D and encouraging innovation in both large organizations and in startups and small businesses. This approach builds upon the existing framework of agency-led, mission-defined support of the private sector used by the U.S. government, as occurs in other programs such as America’s Seed Fund (sometimes known by its acronyms, SBIR and STTR). The integration of specific agency- and mission-focused elements to the credit system ensures that these additive credits support research and researchers whose R&D outcomes will improve the health, prosperity, and opportunity for the U.S. as a whole.

The fuel crisis the Colonial Pipeline shutdown has caused underscores the serious, real-world consequences that bargain has for Americans. As the Biden administration begins to implement its national cybersecurity strategy, it must take steps to address Russia’s strategic negligence toward cybercrime.

This study provides a whole-systems simulation on how to halve global CO2 emissions by 2050, compared to 2010, with an emphasis on technologies and costs, in order to avoid a dangerous increase in the global mean surface temperature by end the of this century.

Richard Revesz, the Lawrence King Professor of Law at New York University and co-founder of the Institute for Policy Integrity, shared his thoughts on how the transition to a new presidential administration later this month will impact U.S. environmental and climate change policy in the latest episode of “Environmental Insights: Discussions on Policy and Practice from the Harvard Environmental Economics Program,” a podcast produced by the Harvard Environmental Economics Program.

Climate@HKSis a new online resource for navigating the full range of climate-related activity across Harvard Kennedy School's research centers, degree programs, and administrative departments.