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Each person in the United States generates five or more pounds (2.3 kilograms) of waste a day: about the weight of a medium bag of sugar. More than half of that garbage is buried and stored in landfills. Increasingly, however, cities are promoting recycling programs, often getting schools involved so students can learn about recycling and follow these practices at home. A person in a Scandinavian country (such as Sweden, Denmark, or Norway) generates about the same amount of waste as an American. People in developing countries generate less waste than Americans or Europeans; for example, a person in India generates about three-fourths of a pound (0.34 kilograms) per day. Still, every country must find a way to process the garbage that each of its residents generates every day, month, and year.

Across the globe, as economies grow, so too does the incidence of colorectal cancer. Lifestyle changes are to blame, and in this Nature Video we see how increases in colorectal cancer are affecting many countries around the world, and what this could mean in the future to a world that is still developing.

As a Sunday target date approaches for countries to submit to the United Nations their plans for fighting climate change, China is banding together with other major developing nations to stress that only the wealthier countries need to make internationally binding commitments.

This case study is based on the 2014 Ebola epidemic that spread to multiple highly populated countries in West Africa, making it the largest and most devastating outbreak in the history of the virus. The storyline, inspired by a compilation of factual information, unfolds through a fictional narrative wherein students play the role of an infectious disease specialist in training to learn about the techniques used in the detection, diagnosis, and management of Ebola virus outbreaks. The story is presented as an interrupted "clicker case" that combines problem-based case teaching methods with simulated biological laboratory inquiry through the use of Case It, a free molecular biology software, along with the NCBI's online bioinformatics tools and databases. Students work in groups to collaboratively explore various biological and social aspects of this infectious disease outbreak. This case was developed for senior students at the secondary level and can be modified for use in an introductory biology, microbiology, or epidemiology course at the undergraduate level.

Every year, it inflicts between 250,000 and 500,000 helpless and malnourished young people with early-life blindness. And in half of those cases, it also brings death, according to the World Health Organization. Vitamin A deficiency also puts pregnant women at risk. It's rare in developed countries, but the goal of completely eradicating vitamin A deficiency - mostly in Africa and Southeast Asia - remains unmet. Scientists are now working to genetically engineer "super" bananas that are fortified with crucial alpha- and beta-carotene, which the body converts to vitamin A.

The world is becoming more urban every day, and the process has been ongoing since the industrial revolution in the 18th century. The United Nations now estimates that 3.9 billion people live in urban centres. The rapid influx of residents is however not universal and the developed countries are already urban, but the big rise in urban population in the next 30 years is expected to be in Asia and Africa. Urbanization leads to many challenges for global health and the epidemiology of infectious diseases. New megacities can be incubators for new epidemics, and zoonotic diseases can spread in a more rapid manner and become worldwide threats. Adequate city planning and surveillance can be powerful tools to improve the global health and decrease the burden of communicable diseases.

A year since launching the international partnership, the Combating Antibiotic Resistant Bacteria Biopharmaceutical Accelerator, CARB-X ,announced its second round of antibiotic research and development funding, awarding seven projects in six countries - two in the United States, and one each in France, India, Switzerland, Ireland and the United Kingdom.