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Arctic ice melting at 'amazing' speed, scientists find

Submitted by sindhu on

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By David Shukman Science Editor, BBC News, in Svalbard
Sea ice extent- Millions of kilometres squared
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Scientists in the Arctic are warning that this summer's record-breaking melt is part of an accelerating trend with profound implications.

Norwegian researchers report that the sea ice is becoming significantly thinner and more vulnerable.

Last month, the annual thaw of the region's floating ice reached the lowest level since satellite monitoring began, more than 30 years ago.

It is thought the scale of the decline may even affect Europe's weather.

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Arctic ice melting at 'amazing' speed, scientists find

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Water Deficits

Presentation Date: 

Friday, July 13, 2012

Many places in the world are getting drier-not just becuse of climate change but also because of the demands of irrigation and industry. Lak Chad has shrunk to one-twentieth of its size in 1960. The Aral Sea is about gone. The Colorado river no longer reaches the sea in the dry season. Just 10 percent of Mesopotamian marshlands are left.

Deforestation

Presentation Date: 

Wednesday, July 11, 2012

The same can be said for another threatening global commons issues- the loss of forest cover and the advance of deserts ans savannas the world over. Few of us realize how central a role forests play. Along with woodlands and scattered trees, forests provide the planet's population with shelter, food, fuelwood, medicines, building materials and paper.

Global Warming

Presentation Date: 

Monday, July 9, 2012

Global Warming is rapidly emerging as one of the toughest and most threatening of the twenty or so inherently global issues. This issue is so big, so much in the limeligh, that the author spends more time on it than on the others in this chapter.

Climate Panel Cites Near Certainty on Warming

Submitted by Raija Engblom on

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Aug 29, 2013 - Justin Gillis - nytimes.com
A new report from the Intergovernmental Panel on Climate Change states that the authors are now 95 percent to 100 percent confident that human activity is the primary influence on planetary warming.
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An international panel of scientists has found with near certainty that human activity is the cause of most of the temperature increases of recent decades, and warns that sea levels could conceivably rise by more than three feet by the end of the century if emissions continue at a runaway pace.

The scientists, whose findings are reported in a draft summary of the next big United Nations climate report, largely dismiss a recent slowdown in the pace of warming, which is often cited by climate change doubters, attributing it most likely to short-term factors.

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Climate Panel Cites Near Certainty on Warming

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Renewables-based Desalination: A Solution to MENA's Water Crisis

Submitted by Raija Engblom on

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Sep 2, 2013 - Dr. Nasser Saidi, Chairman, Clean Energy Business Council - renewableenergyworld.com
Dry soil
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"You never miss the water till the well runs dry" is an old idiom that is becoming a harsh reality for the Middle East and North Africa region and globally. Water scarcity is now this century's imminent greatest problem, a clear and present danger. This is no surprise considering 85 percent of the world’s population lives in the driest half of the planet. The United Nations estimates that, already, 6 to 8 million people die annually from the consequences of disasters and water-related diseases, with a child dying from a water-related illness every 21 seconds.

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Renewables-based Desalination: A Solution to MENA's Water Crisis

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Biodiversity and ecosystem losses

Submitted by aashishrathi on

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Docment: 

File biodiversity.pptx

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WRSC

Biodiversity and ecosystem losses

Presentation Date: 

Monday, July 16, 2012

Biodiversity and ecosystem protection is one of the big and urgent global issues of the decade to come. The solutions are too complex to be laid out here, but a global framework would include many elements: protected areas, actively managed preserves, trade bans, integrated ecosystem management, certification of sustainability, seed banks, satellite monitoring, and many others.

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  • Biodiversity and ecosystem losses
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Is San Diego's water sustainable?

Submitted by aashishrathi on

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Docment: 

File 2013_green_scene_-_sustainability.pptx

Source: 

Cathleen Pieroni, Principal Water Resources Specialist

What does Water Supply Sustainability mean to San Diego? 

  • Living within our water “means”? 
  • Living within our water and energy “means”? 
  • Having enough reliable water supplies to meet present and future water demands? 
  • Minimal negative impacts to the environment? 

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