By air, land and sea, Africans are moving in their millions to Europe and America, and the trend isn’t abating.

Nearly 1.5 million people have left sub-Saharan Africa for Europe and the United States since 2010.

And according to researchers in a report on Thursday, millions more are making plans to follow in their footsteps.

According to the Pew Research Center, a polling and demographic research group in Washington, Nigeria, Ghana and Kenya were the biggest sources of migrants to Europe and the United States among the dozens of nations south of the Sahara.

The large-scale movement of people out of sub-Saharan Africa has grown steadily nearly every year since 2010, the Pew study said.

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“Global migration overall has strained resources in host countries that are struggling to shoulder the costs. In some places, migration has fueled political tensions and calls for the closing of borders.

“Migrants, meanwhile, leave homelands that offer few job prospects, low wages and the dangers of conflict, political instability and modern-day slavery,” the study said.

Millions more people from the Sub-Saharan region indicated that they would leave if they could, according to Pew findings from six countries.

“The survey results do indicate a certain restlessness among people who want to leave their countries or plan to in the next years,” Phillip Connor, senior researcher of the report, told the Thomson Reuters Foundation.

He however noted that not all of those will necessarily follow through and move.

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