"Major extinction events in Earth's history have been associated with warm climates and oxygen-deficient oceans," the analysis published in the journal Science stated.
"Under the current trajectory that is where we would be headed. But the consequences to humans of staying on that trajectory are so dire that it is hard to imagine we would go quite that far down that path," Denise Breitburg, an author of the study and researcher at the Smithsonian Environmental Research Center in the U.S., told the Guardian.
Human activities are largely responsible for the growth of ocean dead zones. Climate change, caused by fossil fuel emissions, is behind the large-scale removal of oxygen in open waters. Open oceans have naturally low oxygen areas that typically lay west of continents due to the Earth's rotation.
Coastal zones, which provide jobs to 350 million people, are now home to at least 500 known dead zones, though that number could be much higher. According to the study, these areas have increased by an area roughly the size of the European Union since 1950, when there were 50 reported around the world.
This global map indicates coastal sites where industrial activity, including large-scale and chemical-intense farming, are suffocating ocean life. International Oceanographic Commission / Smithsonian Environmental Research Center
In coastal regions, algae blooms are the main culprits behind dead zones. Manure, sewage and fertilizers create these blooms. When the algae decomposes it sucks oxygen out of the water.
"This is a problem we can solve," Breitburg told the Guardian, pointing to the River Thames in the UK and the Chesapeake Bay in the U.S., where improved sewage and agricultural practices helped remove dead zones.
"Right now, the increasing expansion of coastal dead zones and decline in open ocean oxygen are not priority problems for governments around the world. Unfortunately, it will take severe and persistent mortality of fisheries for the seriousness of low oxygen to be realized," Robert Diaz, a professor at the Virginia institute of Marine Science who reviewed the study, told the Guardian.
"No other variable of such ecological importance to coastal ecosystems has changed so drastically in such a short period of time from human activities as dissolved oxygen," Diaz said.
New Jersey is one step closer to passing what environmental advocates say is the strongest anti-plastic legislation in the nation.
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The House of Representatives passed a sweeping bill to boost clean energy while phasing out the use of coolants in air conditioners and refrigerators that are known pollutants and contribute to the climate crisis, as the AP reported.
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By Governor Jay Inslee
Climate Week this year coincides with clear skies in Washington state for the first time in almost two weeks.
In just a few days in early September, Washington state saw enough acres burned – more than 600,000 – to reach our second-worst fire season on record. Our worst fire season came only five years ago. Wildfires aren't new to the west, but their scope and danger today is unlike anything firefighters have seen. People up and down the West Coast – young and old, in rural areas and in cities – were choking on smoke for days on end, trapped in their homes.
Fires like these are becoming the norm, not the exception.
By Bill McKibben
To understand the planetary importance of this autumn's presidential election, check the calendar. Voting ends on November 3—and by a fluke of timing, on the morning of November 4 the United States is scheduled to pull out of the Paris Agreement.
President Trump announced that we would abrogate our Paris commitments during a Rose Garden speech in 2017. But under the terms of the accords, it takes three years to formalize the withdrawal. So on Election Day it won't be just Americans watching: The people of the world will see whether the country that has poured more carbon into the atmosphere than any other over the course of history will become the only country that refuses to cooperate in the one international effort to do something about the climate crisis.
By Oliver Milman
The climate crisis is set to be a significant factor in a U.S. presidential election for the first time, with new polling showing a clear majority of American voters want decisive action to deal with the threats posed by global heating.