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Artículos sobre United States

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South Korean people watch a live TV report showing North Korea’s special announcement that it has successfully tested an intercontinental ballistic missile (ICBM) at a station in Seoul, South Korea, 29 November 2017. EPA-EFE/KIM HEE-CHUL

For Beijing, the greatest threat to China’s national security is not the Kim regime: it is the US

China is reluctant to be more active in dealing with Pyongyang for fear of consolidating the US take over in the region.
A wastewater injection well in Coyle, Oklahoma. Increases in wastewater injection at the underground can destabilise pre-existing faults, setting off earthquakes. J. Berry Harrison III / News 9 Oklahoma

Earthquakes caused by industrial activities: what are the risks and how can they be reduced?

As global demand for energy and mineral supplies increases worldwide, the number of man‑made earthquakes is expected to rise. That increases the importance of understanding connection between the two.
In this 2013 photo, a resident of Tijuana, Mexico, holds onto the bars that make up the border wall separating the U.S. and Mexico near San Diego. President Donald Trump is proposing to dramatically expand the wall. (AP Photo/Gregory Bull, File)

How walls like Trump’s destroy the past and threaten the future

Donald Trump’s proposed border wall will destroy historic and ancient sites, violate the rights of Indigenous populations and cause misery to those seeking a better life. What’s more? It won’t work.
Thirsty? Perhaps a cool glass of lemonade would hit the spot.

What comes after the lemonade stand? Fuelling self‑efficacy and intentions in our next generation of entrepreneurs

Entrepreneurship is a matter of society. Schools should be engaged to coach students, starting at an early age, by working on their perception of self-efficacy and entrepreneurial intention.
Perth has long had many fine parks but is losing vegetation cover in a band of increasingly dense development across the city. Ruben Schade/flickr

We’re investing heavily in urban greening, so how are our cities doing?

A new study shows major Australian cities are suffering an overall loss of green space – although some areas are doing better than others.

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