Hepatitis C virus (HCV) exhibits high genetic diversity, characterized by regional variations in genotype prevalence. This poses a challenge to the improved development of vaccines and pan-genotypic treatments, which require the consideration of global trends in HCV genotype prevalence. Here we provide the first comprehensive survey of these trends.

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Recently, Delhi was touted as giving competition to Beijing as the city with the most polluted air and heaviest smog. This interactive shows the most polluted places in the world, rated as having either the worst air, water, land or soil due to various reasons—industrial, chemical, traffic, mining, waste processing and other human activities. In this infographic we cite some of the most polluted places we've encountered. But it is important to point out that the problem is really much larger than these sites.

The BRT Standard is an evaluation tool for world-class bus rapid transit (BRT) based on international best practices.

Global Trends 2014 looks at the attitudes and behaviours of consumers and citizens in 20 key countries around the world.

The goal of a global carbon market to tackle climate change, once touted to reach $2 trillion by 2020, received a major setback when Australia on Thursday scrapped its planned carbon trading scheme

Germany comes in first in a new energy efficiency ranking of the world’s major economies, followed by Italy, the European Union as a whole, China, and France, according to the 2014 International Energy Efficiency Scorecard published today by the nonprofit American Council for an Energy-Efficient Economy (ACEEE). New to the rankings this year are four nations: India, Mexico, South Korea, and Spain. Now in its second edition, the ACEEE report finds that, while some countries are still significantly outperforming others, there are substantial opportunities for improved energy efficiency in all economies analyzed, including the U.S., which ranked 13th out of 16 nations – behind countries such as China, Canada, and India. The new carbon pollution standards for existing power plants proposed this June by the U.S. Environmental Protection Agency (EPA) would be a major stride in the direction of greater energy efficiency in the U.S. There are dozens of other international best practices that the U.S. could implement to improve its score.

A country that uses less energy to achieve the same or better results reduces its costs and pollution, creating a stronger, more competitive economy. While energy efficiency has played a role in the economies of developed nations for decades, cost-effective energy efficiency remains a massively underutilized energy resource.

AIDS can be brought under control by 2030, according to a global report issued by the United Nations AIDS agency on Wednesday.

Cooling of the Pacific Ocean over the last month means the El Niño forecast to hit later this year is increasingly unlikely to be a strong event, the Australian Bureau of Meteorology (BOM) said on

The majority of the world’s major cities have disclosed that climate change presents a physical risk to the businesses operating in their cities. This real and current threat is driving local governments to take concrete action in response finds this fourth CDP Cities Annual Report released by CDP in partnership with Bloomberg Philanthropies, C40 Cities and AECOM. It covers 207 cities from Africa Asia, Europe, Latin America, North America, South Asia and Oceania

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