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The Port of Hamburg's trade volume has more than doubled since 1990 and is projected to double again by 2030. Andrew Schneider for NPR hide caption

itoggle caption Andrew Schneider for NPR

A worker picks clingstone peaches in Greece. Most of the country's farms are small and family owned. Production costs can be high, and Greek farmers have had trouble competing internationally. Konstantinos Tsakalidis/Bloomberg via Getty Images hide caption

itoggle caption Konstantinos Tsakalidis/Bloomberg via Getty Images

The state-run Iran-Khodro plant manufactures vehicles including the Peugeot 206 car, shown on a production line in 2014 near Tehran. Iran's robust auto industry was built in response to sanctions. Ebrahim Noroozi/AP hide caption

itoggle caption Ebrahim Noroozi/AP

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Iranian stockbrokers monitor share prices at the Tehran Stock Exchange in April. The historical Iran nuclear deal could open the country's market up to international investors. Vahid Salemi/AP hide caption

itoggle caption Vahid Salemi/AP

Shoppers make their way in a Tehran bazaar. Once international sanctions are lifted, $100 billion from Iranian oil sales will be released from escrow accounts. Vahid Salemi/AP hide caption

itoggle caption Vahid Salemi/AP

Greek Finance Minister Euclid Tsakalotos attends a session of Parliament in Athens on Wednesday as lawmakers prepared to vote on reforms demanded by eurozone creditors in exchange for a new bailout. Aris Messinis/AFP/Getty Images hide caption

itoggle caption Aris Messinis/AFP/Getty Images

The drachma was Greece's currency before it joined the eurozone in 2001. There's now talk that Greece could leave the euro and return to its old currency, though economists say the transition would be difficult and the drachma would likely be extremely weak. Christopher Furlong/Getty Images hide caption

itoggle caption Christopher Furlong/Getty Images

Greek supporters of the "no" vote celebrate at Syntagma Square in Athens on Sunday night after the results were announced. Greeks overwhelmingly rejected the demands of creditors for more austerity in return for rescue loans. But the country has no clear way out of its financial crisis. Petr David Josek/AP hide caption

itoggle caption Petr David Josek/AP

A Greek demonstrator urges a "no" vote in Sunday's referendum on whether Greece should accept international demands for additional financial austerity. He is holding an old 1,000 Greek drachma bank note during a rally in the northern Greek port city of Thessaloniki on Monday. Some Greeks say the country should leave the eurozone and go back to the drachma. Giannis Papanikos/AP hide caption

itoggle caption Giannis Papanikos/AP

Some 800 migrants from the Middle East arrive at the Greek port of Piraeus on Sunday. Smugglers are charging thousands of dollars to take migrants across the Mediterranean, and prices can vary widely. Children are often allowed to travel for free. Anadolu Agency/Getty Images hide caption

itoggle caption Anadolu Agency/Getty Images

Pots with genetically modified male Aedes aegypti mosquitoes are pictured before they are released in Piracicaba, Brazil in April. Paulo Whitaker /Reuters /Landov hide caption

itoggle caption Paulo Whitaker /Reuters /Landov

The Hadera desalination plant is one of five built in Israel after a severe drought in the 1990s. Along with conservation efforts and water recycling, the plants have helped end Israel's chronic water shortages. Emily Harris/NPR hide caption

itoggle caption Emily Harris/NPR

Miami swimwear entrepreneur Mel Valenzuela (right) explains online strategies to Cuban business owners Victor Rodriguez (middle) and Caridad Limonta (left) in Wynwood this month. Miami boutique owner Monica Minagorri (rear) watches. Tim Padgett/WLRN hide caption

itoggle caption Tim Padgett/WLRN

Nouf al-Mazrou, with the red head scarf in the center, runs a barbeque catering business from her home in the Saudi capital Riyadh. She's shown here at a gathering of Saudi women who have launched businesses on Instagram. The event was held at a private girls school. Deborah Amos / NPR hide caption

itoggle caption Deborah Amos / NPR

One of the first homes going up on land bought and sold as part of a Canadian-Palestinian investment firm's effort to properly register plots. Much land in the West Bank is not registered and has no title deed, creating problems for economic development. Emily Harris/NPR hide caption

itoggle caption Emily Harris/NPR

Money is pouring into the stock market, but most new investors only have a middle-school education, says Texas A&M University economist Gan Li. Frank Langfitt/NPR hide caption

itoggle caption Frank Langfitt/NPR

Passengers go to the Nanchang railway station in eastern China in February 2014, at the end of the Chinese New Year holiday. In the past, it was often the only time of year that migrant workers were able to return home. Now, economic pressures on factories in coastal China have led to a reversal of a decades-long migration of workers from inland to the coast. Zhou Ke/Xinhua/Landov hide caption

itoggle caption Zhou Ke/Xinhua/Landov

The view west from London's newest skyscraper looks over the River Thames and St. Paul's Cathedral. Russians have flocked to the English property and banking sectors as the economy crumbles back home. Peter Macdiarmid/Getty Images hide caption

itoggle caption Peter Macdiarmid/Getty Images

Language instructor Soh Bor-am teaches eight Mandarin classes a day, as Chinese tourism to South Korea swells. Elise Hu/NPR hide caption

itoggle caption Elise Hu/NPR

A Palestinian family leaves the visitors center at Rawabi. Tanya Habjouqa for NPR hide caption

itoggle caption Tanya Habjouqa for NPR

A platform owned by Mexico's state-run oil company Pemex is seen off the Bay of Campeche in the Gulf of Mexico. The country has recently opened up its energy sector to foreign investors. Victor Ruiz/Reuters/Landov hide caption

itoggle caption Victor Ruiz/Reuters/Landov