As the economic output and populations of China, India and Brazil grow, the countries’ energy consumption will continue to rise. Because traditional energy sources such as oil and coal are both nonrenewable and limited, these countries are pushing to develop new forms of alternative energy. Given that the United States remains the highest per capita consumer of energy, the need for sustainable energy sources is considered by many domestically to be a vital national interest.

One theory for how to best help developing countries is to increase their inward flow of foreign direct investment (FDI). However, identifying the conditions that best attract such investment flow is difficult, since foreign investment varies greatly across countries and over time. Knowing what has influenced these decisions and the resulting trends in outcomes can be helpful for governments, non-governmental organizations, businesses, and private donors looking to invest in developing countries.

Energy drinks, once aimed exclusively at athletes, have become a significant force in the worldwide beverage market. They come in a dizzying variety of colors, often feature exotic ingredients — guarana, ginseng, and ginkgo biloba, to name just a few — and aren’t shy when it comes to health claims. Marketers’ efforts to rebrand such drinks as “nutrition beverages” have continued to spur sales growth, though this comes at a time when the content of the drinks is coming under increased scrutiny.

According to the U.S. Consumer Product Safety Commission, nine million cribs have been recalled since September 2007 because of safety issues. While many studies have been conducted on the rate of infant mortalities which occurred in cribs, playpens and bassinets, until recently little was known about the non-fatal injuries.

In March 2011 a series of cascading disasters hit the northeast coast of Japan — earthquake and tsunami, then a nuclear emergency. While the first two created widespread devastation and untold suffering, the third is likely to have the longest-felt effects. After the debris has been removed, towns rebuilt and the economy stabilized, evidence from Chernobyl indicates that health concerns will persist for nearby residents for decades to come.

The use of nuclear weapons in an urban area, particularly by a terrorist group, remains a palpable threat for many in a post-9/11 world. As populations congregate in ever-larger cities around the globe, scientists are seeking to measure all the likely physical impacts of such an attack on these dense clusters.

Public health research has found that populations of lower socioeconomic status have less access to healthier foods, which are associated with a decreased prevalence of chronic diseases. Such foods include fresh produce, low-fat dairy products and lean meat. This decreased access is due to the prevalence in poorer communities of small stores that primarily sell foods with a long shelf-life, as opposed to the fresher, more perishable foods that are essential for a high-quality diet.

Many communities susceptible to dangerous events such as tornadoes have implemented systems to spread word quickly. In principle, the widespread use of Internet, mobile and computer technologies can better facilitate communication, and university campuses are interconnected in a way that make them an interesting case study in how rapid communication systems can be deployed.