It’s nice to get away and head to the Caribbean, especially when its freezing cold here in NYC. But as I was enjoying my frosty beer and endless buffet, I started to wonder about the environmental impact of my trip. So, because I can’t help myself, I did a little research on the environmental sustainability of the cruise ship industry – with a particular focus on carbon intensity. Deep down I had a nagging concern that cruise ships might be awful for the environment. Bottom line: cruising is indeed very carbon intensive!
Advances in technology, improved economics, and broad political support are making wind power a formidable twenty-first century energy resource. Top-ranking Denmark draws 41% of its electricity from wind; Ireland follows with 28%; the European Union as a whole gets 14% of its power from wind.
While the Amazon plays a vital role in global carbon absorption (and we should continue to try and save it), between 1994 and 2007, our oceans absorbed 34 gigatons of the world’s carbon through algae, vegetation, and coral. In other words, the trees might not save us—but the oceans could.
Climate change is heating the oceans and altering their chemistry so dramatically that it is threatening seafood supplies, fueling cyclones and floods and posing profound risks to the hundreds of millions of people living along the coasts.
Sea surface temperatures have a large influence on climate and weather. For example, every 3 to 7 years a wide swath of the Pacific Ocean along the equator warms by 2 to 3 degrees Celsius. This warming is a hallmark of the climate pattern El Niño, which changes rainfall patterns around the globe, causing heavy rainfall in the southern United States and severe drought in Australia, Indonesia, and southern Asia.
You’ve probably seen videos of these impacts first hand, like a sea turtle with a plastic straw embedded in its nose or a whale entangled in a fishing net, approaching divers that release it from harm. Some of these incidents have happy endings, but in reality, many more do not. Plastic has been found in more than 60% of all seabirds and in 100% of sea turtles species, that mistake plastic for food. And when animals ingest plastic, it can cause life-threatening problems, including reduced fitness, nutrient uptake and feeding efficiency—all vital for survival. Every year, 8 million metric tons...
Aquaculture is surfacing as an attractive sector for green investors. The farming of fish, and other waterborne organic protein, such as algae, is becoming increasingly important to the world’s growing population. Aquaculture’s share of global fish consumption climbed to 50% in 2014 from 18% in 1990, and is expected to reach 57% by 2025, according to UBS.
The UK government recently launched a clean maritime plan to achieve zero-emission shipping and clean growth for the maritime sector—one of the first countries to do so. A key action is that, by 2025, all new vessels being ordered for use in UK waters are designed with zero-emission propulsion capability.
Like many Florida waters, Lake Bonnet had become overrun with plant slime. In fact, all 50 states and many countries worldwide are struggling with epidemic levels of algae that can prove toxic to people and ecosystems. “Red tides” of algae along Florida’s Gulf Coast have killed tons of fish and marine mammals.
The fact that cruise ships are causing pollution in the port cities they visit is not a new one, but a recent study shows that ships operated by a single line emitted ten times more sulphur oxides (SOx) than all of Europe’s 260 million cars in 2017.
The world population is expected to grow by at least 2 billion people between now and 2050. That’s going to take a lot more food, and our appetites are already having planetary consequences: Raising cattle for food is huge source of emissions, and we’ve done enormous damage to ocean ecosystems with our fishing.