Science & Technology

China hopes to see good results from trade talks with the United States, the country’s foreign ministry said on Monday (Feb 11), as the the latest round of negotiations began in Beijing.  

Interview with Hassan Ahmadian, a Postdoctoral Research Fellow at the Iran Project, Harvard Kennedy School Belfer Center for Science and International Affairs, to discuss topics such as the role of the U.S. in Syria and broadly in the MENA region; identity issues; and the role of Iran and the future of the nuclear deal.

The authors examine the complexities of designing policies that can keep Earth within the biophysical limits favorable to human life.

Making technological change positive for all is the critical challenge of our time. We ourselves—not only the logic of discovery and market forces—must manage it. To create a future where technology serves humanity as a whole, we need a new approach. Therefore, the Belfer Center has launched a new endeavor, the Technology and Public Purpose (TAPP) Project.

Will protests at home hurt French President Macron's efforts to be seen as a leader of the West? Former U.S. ambassador to NATO Nicholas Burns digs in.

We review the capabilities and costs of various lofting methods intended to deliver sulfates into the lower stratosphere. We lay out a future solar geoengineering deployment scenario of halving the increase in anthropogenic radiative forcing beginning 15 years hence, by deploying material to altitudes as high as ~20 km. After surveying an exhaustive list of potential deployment techniques, we settle upon an aircraft-based delivery system. Unlike the one prior comprehensive study on the topic (McClellan et al 2012 Environ. Res. Lett. 7 034019), we conclude that no existing aircraft design—even with extensive modifications—can reasonably fulfill this mission. However, we also conclude that developing a new, purpose-built high-altitude tanker with substantial payload capabilities would neither be technologically difficult nor prohibitively expensive. We calculate early-year costs of ~$1500 ton−1 of material deployed, resulting in average costs of ~$2.25 billion yr−1 over the first 15 years of deployment. We further calculate the number of flights at ~4000 in year one, linearly increasing by ~4000 yr−1. We conclude by arguing that, while cheap, such an aircraft-based program would unlikely be a secret, given the need for thousands of flights annually by airliner-sized aircraft operating from an international array of bases.

Last week, Special Envoy of Senegal's Head of State, Aminata Touré hosted a seminar at Harvard University. She addressed several questions regarding US-African relations.

Imagine a bully who’s pounding your head against a wall. When you complain that it hurts and threaten to punch back, he offers to sign an international agreement against bullying. Meanwhile, he keeps pounding your head.

Elon Musk jolted markets and shareholders when he tweeted his intention to take his electric car company, Tesla, private. Saudi billions, he proposed, could help the company escape the pressures of being publicly listed. In a blog post, Musk said that “the Saudi Arabian sovereign wealth fund [had] approached [him] multiple times about taking Tesla private”.