Ten things to know before you take a cruise

It is estimated that almost 22 million people will take a cruise in 2014. While the cruise industry has made a commitment to protect the marine ecosystems and the unique communities they visit, there remains plenty of room for improvement. To hold cruise lines accountable, Friends of the Earth produces an annual Cruise Ship Report Card grading the lines on their environmental and human health impacts.

If you are planning to explore the oceans by cruise ship this summer, here are some facts you should know about the environmental impact of your vacation.

Note: This infographic was updated in June 2015.