2. Coral Reefs are Destructed
It is reported that at present there are 7,000 coral reefs around the globe. Environmentalists say that by 2050 all of them will have disappeared. There are a lot of factors that influence our planet’s wellbeing. Along with global warming, littering, air and water pollution, cruise ships make a negative impact on the issue. The number of people willing to travel by ships is only increasing, which means that whether coral reefs will survive will depend on those who travel by water.