Sustainability

Tag Archives: earth’s ecosystem

One of the most worrisome predictions about climate change may be coming true

Two years ago, former NASA climate scientist James Hansen and a number of colleagues laid out a dire scenario in which gigantic pulses of fresh water from melting glaciers could upend the circulation of the oceans, leading to a world of fast-rising seas and even superstorms.

Hansen’s scenario was based on a computer simulation, not hard data from the real world, and met with skepticism from a number of other climate scientists. But now, a new oceanographic study appears to have confirmed one aspect of this picture — in its early stages, at least.

The new research, based on ocean measurements off the coast of East Antarctica, shows that melting Antarctic glaciers are indeed freshening the ocean around them. And this, in turn, is blocking a process in which cold and salty ocean water sinks below the sea surface in winter, forming “the densest water on the Earth,” in the words of study lead author Alessandro Silvano, a researcher with the University of Tasmania in Hobart.

https://www.washingtonpost.com/news/energy-environment/wp/2018/04/23/one-of-the-most-worrisome-predictions-about-climate-change-may-be-coming-true/?noredirect=on&utm_term=.350ee40a21c8

7 things we’ve learned about Earth since the last Earth Day

Our understanding of Earth — and how we’re changing it — just keeps expanding.

Earth Day turns 48 today, April 22, and Google is celebrating it with a Google Doodle of conservationist Dr. Jane Goodall, who nudges us in a video a “do our part for this beautiful planet.”

When Senator Gaylord Nelson (D-Wisc.) founded Earth Day in 1970, his hope was to make the environment a political issue in an era where US rivers caught on fire and thick smog choked cities.

In many ways, it worked. Since then, major environmental laws have helped clean up much of the vivid toxic detritus in the soil, air, and water in the US. But our challenges today are no less daunting. The accumulation of greenhouse gases in the atmosphere, the loss of wilderness and species, and the acidification and pollution of the oceans have all become more acute — and more destabilizing.

In keeping with the tradition started by former Vox writers Brad Plumer and Joseph Stromberg, here are seven of the most troubling, intriguing, and encouraging things we learned about the Earth since the last Earth Day.

https://www.vox.com/2018/4/21/17247994/earth-day-2018-plastic-climate-change

Wrapped in a Sea of Plastic

Half a century of this “uncontrolled experiment” is fast becoming as serious a problem as climate change.

Plastics everywhere was bad enough, but now multiple studies have found that 94 percent of our drinking water and 93 percent of sampled bottled water worldwide are full of plastic particles and chemicals, including BPA, heavy metals, phthalates, pesticides, PCBs and other chemicals, many of which are linked in animal studies as well as some human studies to cancer, premature puberty, reduced immunity, birth defects, endocrine disruption, insulin resistance, and other major diseases.  And we have no idea and neither does the FDA, EPA, or any other federal agency, whether this lethal cocktail, which binds together with other toxins, is having an even more profound impact on our health and that of our kids.  What we get now from those agencies is “conflicting findings” and “uncertainties” about the potential impact of plastics-related chemicals. What we do know is that governments only test or analyze the impacts of individual chemicals to determine the levels of potentially life-threatening exposure, making it impossible to figure out the combined total load of chemicals from plastics our babies can safely absorb.

https://www.commondreams.org/views/2018/03/31/wrapped-sea-plastic

Biodiversity and Nature’s Contributions Continue Dangerous Decline, Scientists Warn

Biodiversity and Nature’s Contributions Continue

 Dangerous Decline, Scientists Warn

Human well-being at risk. Landmark reports highlight options to protect and restore nature and its vital contributions to people

Biodiversity – the essential variety of life forms on Earth – continues to decline in every region of the world, significantly reducing nature’s capacity to contribute to people’s well-being. This alarming trend endangers economies, livelihoods, food security and the quality of life of people everywhere, according to four landmark science reports released today, written by more than 550 leading experts, from over 100 countries.

The result of three years of work, the four regional assessments of biodiversity and ecosystem services cover the Americas, Asia and the Pacific, Africa, as well as Europe and Central Asia – the entire planet except the poles and the open oceans. The assessment reports were approved by the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES), in Medellín, Colombia, at the 6th session of its Plenary. IPBES has 129 State Members.

https://www.ipbes.net/news/biodiversity-nature’s-contributions-continue-%C2%A0dangerous-decline-scientists-warn

‘Dead zone’ in Gulf of Mexico will take decades to recover from farm pollution

A new study says that even in the ‘unrealistic’ event of a total halt to the flow of agricultural chemicals the damage will persist for 30 years.

The enormous “dead zone” in the Gulf of Mexico will take decades to recover even if the flow of farming chemicals that is causing the damage is completely halted, new research has warned.

Intensive agriculture near the Mississippi has led to fertilizers leeching into the river, and ultimately the Gulf of Mexico, via soils and waterways. This has resulted in a huge oxygen-deprived dead zone in the Gulf that is now at its largest ever extent, covering an area greater than the state of New Jersey.

A new study has found that even if runoff of nitrogen, a fertilizer chemical, was fully stemmed, the Gulf would take about 30 years to recover. Even this scenario is “not only considered unrealistic, but also inherently unsustainable”, researchers stated in the work, published in Science.

https://www.theguardian.com/environment/2018/mar/22/dead-zone-gulf-of-mexico-decades-recover-study

73% of Deep-Sea Fish Have Ingested Plastic

Microplastics can really be found everywhere, even in the stomachs of creatures living deep underwater.

Marine scientists from the National University of Ireland (NUI) in Galway found the plastic bits in 73 percent of 233 deep-sea fish collected from the Northwest Atlantic Ocean—one of the highest microplastic frequencies in fish ever recorded worldwide.

https://www.ecowatch.com/plastics-deep-sea-fish-2536726086.html

Timelapse video: shipping first as LNG tanker crosses Arctic in winter without icebreaker escort

Teekay vessel Eduard Toll is designed to cut through ice and take advantage of the opening of Russia’s Arctic coastline to industry.

An LNG tanker designed for icy conditions has become the first commercial ship to travel the Arctic’s northern sea route in winter.

It marks a milestone in the opening up of Russia’s northern coastline, as thawing polar ice makes industrial development and maritime trade increasingly viable.

The Teekay vessel Eduard Toll set out from South Korea in December for Sabetta terminal in northern Russia, cutting through ice 1.8m thick. Last month, it completed the route, delivering a load of liquefied natural gas (LNG) to Montoir, France. Its voyage was captured by the crew in a timelapse video.

Timelapse video: shipping first as LNG tanker crosses Arctic in winter without icebreaker escort

What Does China’s ‘Ecological Civilization’ Mean for Humanity’s Future?

Imagine a newly elected president of the United States calling in his inaugural speech for an “ecological civilization” that ensures “harmony between human and nature.” Now imagine he goes on to declare that “we, as human beings, must respect nature, follow its ways, and protect it” and that his administration will “encourage simple, moderate, green, and low-carbon ways of life, and oppose extravagance and excessive consumption.” Dream on, you might say. Even in the more progressive Western European nations, it’s hard to find a political leader who would make such a stand.

And yet, the leader of the world’s second largest economy, Xi Jinping of China, made these statements and more in his address to the National Congress of the Communist Party in Beijing last October. He went on to specify in more detail his plans to “step up efforts to establish a legal and policy framework … that facilitates green, low-carbon, and circular development,” to “promote afforestation,” “strengthen wetland conservation and restoration” and “take tough steps to stop and punish all activities that damage the environment.” Closing his theme with a flourish, he proclaimed that “what we are doing today” is “to build an ecological civilization that will benefit generations to come.” Transcending parochial boundaries, he declared that his Party’s abiding mission was to “make new and greater contributions to mankind … for both the well-being of the Chinese people and human progress.”

https://www.ecowatch.com/china-ecological-civilization-2532760301.html

The Queen declares war on plastic after David Attenborough documentary

Buckingham Palace outlined new waste plans and said there was a ‘strong desire to tackle the issue’ at the highest levels of the Royal household.

It is thought that the Queen became personally interested in the problem of plastic after working with Sir David Attenborough on a conservation documentary dealing with wildlife in the Commonwealth.

The new measures include gradually phasing out plastic straws in public cafes and banning them altogether in staff dining rooms.

Internal caterers at Buckingham Palace, Windsor Castle, and the Palace of Holyroodhouse in Edinburgh will now only be allowed to use china plates and glasses, or recyclable paper cups.

http://www.telegraph.co.uk/news/2018/02/11/queen-declares-war-plastic-david-attenborough-documentary/

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