planted city

Thinking Globally: ‘How Much Water is on Earth’

From The US Geological Survey:

The largest sphere represents all of Earth’s water, and its diameter is about 860 miles (the distance from Salt Lake City, Utah, to Topeka, Kansas). It would have a volume of about 332,500,000 cubic miles (mi³) (1,386,000,000 cubic kilometers (km³)). The sphere includes all the water in the oceans, ice caps, lakes, and rivers, as well as groundwater, atmospheric water, and even the water in you, your dog, and your tomato plant.

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The blue sphere over Kentucky represents the world’s liquid fresh water (groundwater, lakes, swamp water, and rivers). The volume comes to about 2,551,100 mi³ (10,633,450 km³), of which 99 percent is groundwater, much of which is not accessible to humans. The diameter of this sphere is about 169.5 miles (272.8 kilometers).

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Do you notice that “tiny” bubble over Atlanta, Georgia? That one represents fresh water in all the lakes and rivers on the planet, and most of the water people and life of earth need every day comes from these surface-water sources. The volume of this sphere is about 22,339 mi³ (93,113 km³). The diameter of this sphere is about 34.9 miles (56.2 kilometers). Yes, Lake Michigan looks way bigger than this sphere, but you have to try to imagine a bubble almost 35 miles high—whereas the average depth of Lake Michigan is less than 300 feet (91 meters).

You can read more info and the methodology used to calculate the size of our global water supply here. 

(Photo source: US Geological Survey)

From The Guardian:

Countries must take urgent steps to value their natural capital – such as forests, peatlands and coastal areas – as part of their economic development, the World Bank has urged.

Placing a monetary value on natural ecosystems is a key step on the road to “green” economic growth, according to the World Bank, which published a report on green growth on Wednesday at a conference in Seoul, Korea.

By making such estimates, countries can develop policies that ensure the pursuit of economic growth does not occur at the expense of future growth potential, by destroying natural assets such as water sources or polluting air, rivers and soil.

Rachel Kyte, vice president for sustainable development at the bank, said that the patterns on which economic growth had been achieved in recent decades were unsustainable, because of the amount of environmental degradation involved.

She said: “At current rates, we are in danger of undermining the basis on which growth has been achieved in the last decades. We do not believe that current growth patterns are sustainable.”

She gave the example of the government of Thailand, which has moved towards more environmentally sustainable growth by attempting to place a value on its mangrove swamps. The exercise has been illuminating – chopping down mangrove for wood gives a return of less than $1,000 per hectare; removing the mangroves to make room for a shrimp farm might generate nearly $10,000 per hectare; but if the mangrove swamps were retained and their importance in providing a barrier against floods was taken into account, they could be valued at more than $16,000 per hectare.

Kyte acknowledged that few countries had so far taken steps to evaluate their natural systems in this way, and said the failure to do so had contributed to countries allowing their environment to be degraded in the pursuit of short term economic growth.

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In 2010, India said it would become the first country in the world to publish accounts of its natural wealth as well as financial measurements such as GDP.

Check out the rest of the article here.

(Infographic credits: Metro Vancouver, FAO)

Thinking Globally: ‘Living Planet Report 2012’ - Ecological Footprint Index

From WWF:

‎”The Living Planet Report is the world’s leading, science-based analysis on the health of our only planet and the impact of human activity. Its key finding? Humanity’s demands exceed our planet’s capacity to sustain us.” 

You can find your country and see how it compares to others using the interactive Eco Footprint calculator above. 

Related:

~ ‘How to be a conscious consumer’ (WWF)

~ ‘Earth’s environment getting worse, not better, says WWF ahead of Rio+20’ (The Guardian)

Thinking Globally: ‘Welcome to the Anthropocene’

From Planet Under Pressure via Vimeo:

A 3-minute journey through the last 250 years of our history, from the start of the Industrial Revolution to the Rio+20 Summit. The film charts the growth of humanity into a global force on an equivalent scale to major geological processes.

More here.

(Image credit: IGBP)

From The Times Colonist:

A Canadian researcher is at the centre of a provocative new international study that puts an eye-popping price tag on the damage being done to the world’s oceans and fisheries - a cost that could reach $2 trillion a year by 2100 - from carbon emissions, over-fertilization, over-fishing and other human impacts.

University of British Columbia fisheries economist Rashid Sumaila, a leading critic of international fishing policies, is co-editor of the 300-page Valuing The Ocean report released last week at the high-profile Planet Under Pressure environmental conference in Britain.

The study, touted as a “unique,” monetary assessment of global ocean health and threats, is the latest attempt by ecosystem-conscious scientists to affix financial value to planetary resources taken for granted in traditional models of economic activity.

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The project was coordinated by the Swedish-based Stockholm Environment Institute, which said in a statement that “the ocean is the victim of a massive market failure,” and that “the true worth of its ecosystems, services, and functions is persistently ignored by policy-makers and largely excluded from wider economic and development strategies.”

Sumaila said that “the combined global and local threats to the ocean are unprecedented in human history. Incremental change and business-as-usual will not suffice.”

But the global ocean crisis “can be rectified,” the UBC researcher added, “if the ocean and the services it provides are placed at the heart of global efforts to build a green economy for the future.”

Check out the rest of the article here.

(Photo credit: Hani Amir via David Suzuki)

‘Fossils from the Anthropocene’

(Source: Planet Under Pressure 2012)

Happy Spring folks!

‘NASA Images Depict Rapid Loss of Thick Arctic Sea Ice’, 1980 - 2012

From Yale e360:

A new comparison of satellite images from 1980 and 2012 vividly depicts the rapid disappearance of thick, multi-year Arctic Ocean ice in winter. Over the past three decades, the extent of the Arctic’s thickest ice has declined by 15 to 17 percent per decade, according to NASA climate scientist Joey Comiso.

Details over at Yale e360 and NASA’s Earth Observatory.

It’s also worth noting that a new study has found an important link between melting Arctic sea ice and extreme weather being experienced in some regions of our planet. BBC coverage of the study explains that:

The progressive shrinking of Arctic sea ice is bringing colder, snowier winters to the UK and other areas of Europe, North America and China.

More here.

The opening paragraph from the article, ‘Climate change: Durban and everything that matters’, in The Economist. To get a sense of some of the modeled impacts of a 4 C (7 F) hotter Earth check out the map created by the United Kingdom’s national weather agency.  

The final paragraph of Steven Cohen’s current article in the Huffington Post, ‘Sustainability, Politics, and Consumerism’. Cohen is the executive director of the Earth Institute at Columbia University in New York City. 

(Image credit: UWO)