Twenty Nile rivers, and other stories

Water stress: By 2025, to feed growing populations, the world will need to find extra fresh water equivalent to the flow of twenty Nile rivers.

Extreme weather: Bill McKibben ponders just how strange this year has been.

Junk food: George Monbiot concludes that a possible link between Alzheimer's and poor diet might be more than sensationalist media spin.

Heat: 2013 tipped to break more records. With a good chance of an El Niño forming in the coming months, combined with the ongoing warming trend from greenhouse gases, next year could be one for the record books. At least until the next El Niño...

Mangroves: Per hectare lost, mangrove destruction is three times worse for greenhouse gas emissions than deforestation.

NB The following articles are eighteen months out of date, but I neglected to post them earlier and they are interesting.
Malthusians beware: Blame the World Bank and IMF (amongst others) for famine in the Horn of Africa, but don't blame overpopulation.

Deep sea fishing: Is any deep-sea fishing sustainable? The short answer is "almost none". Deep-sea fisheries tend to regenerate very slowly, given the small amounts of energy entering the system. Many of the creatures down there are older than your grandmother.

Organic farming: It can be more profitable than conventional farming over the long term, even if organic premiums drop by 50%.

Climate panic: What we can all be doing about climate change. The Onion nearly always hits the key issue on the nose.

Do rivers have rights?

I spawn fish and I vote
A New Zealand court has recognised that a river has personality sufficient for it to have legal representation in order for its interests to be considered and its rights respected. The move is made in a deliberate echo or parallel of the legal "personhood" of corporations.

In both cases, corporations and natural entities, the personhood that is legally recognised is not identical with that of a "natural person", though it was the idea that corporations are persons that lay behind the 2010 US Supreme Court decision Citizens United that effectively removed any spending cap on corporate political "speech".* This is not the place for a detailed consideration of the history and myriad implications of this legal metaphor. My usual brief reply to this idea is that as long as the US starts applying the death penalty to corporations who commit grave offences, then they can continue with this somewhat odd word games.
*Also lying behind the decision was the equation that campaign money is a form of speech and so falls under the First Amendment protecting freedom of speech. I find both assumptions dubious.

In truth, I don't really know what to make of this development in New Zealand. It seems like an extension/application of the move made in 2009 by the new Bolivian constitution, which acknowledges that nature has rights. There may have been other ways of doing it, but I do think it is imperative that the ecological damage we are doing is brought more clearly and fully into our legal system. There are all kinds of difficulties with this task and I doubt there is a perfect solution. I would be very interested to hear reflections from lawyers (and anyone else) on the possible pros and cons of this precedent.

A variety of theological observations support some kind of legal recognition of creatures (and I'm not confining this word to living beings, but include rivers, mountains, atmosphere, oceans, etc.). The created order is declared "good" in the absence of humanity (Genesis 1); it is sustained and designed for goods that are not exhausted by human projects (Psalm 104); God cares for it simply because he made it (Matthew 6 & 10). In short, non-human creatures have intrinsic, not merely instrumental, worth and cannot rightly be appropriated by or subordinated to human projects without this being given due weight.

Our ecological crises: Wake up and smell the stats

I'd like to put together a list of credible ecological statistics from reputable sources as a resource. Please post links to any such existing lists you are aware of or add any that have grabbed your attention (please make sure you include a source). To start us off, here are a few off the top of my head and in no particular order:

• Humans now affect over 80% of the world's land, 100% of the oceans and 100% of the atmosphere. Around 40% of the oceans have been "strongly affected" by our activities.

• Half of the world’s tropical forests have disappeared since World War II and roughly another 10 million hectares are being felled each year — the equivalent of 40 football fields every minute. The majority are being cleared by illegal loggers.

• Seventy-seven percent of global fisheries are fully exploited, over exploited or have been depleted. Based on 1998 data, the UN Food and Agriculture Organization estimates that global fishing fleets "are 2.5 times larger than needed."

• Marine apex predator numbers (i.e. large fish and sharks) have declined by 90% over the last 50-100 years, mainly due to overfishing (more stats on marine life decline). Another recent study put tuna decline at 60% in the last 50 years.

• Deep-sea trawling damages an area of sea bed twice the size of the contiguous USA each year.

• We're removing 9-10,000 tonnes of fish from the ocean every hour.

• As far as we can work out (and there are wide error margins on this one), species are currently going extinct at something like 100-1000 times the background rate of extinction, faster than at any time since the extinction of the dinosaurs 65 million years ago. It is likely that somewhere between 5,000 and 30,000 species become extinct each year. All the primary drivers of these trends are linked to human activities: land use changes, habitat destruction, pollutants, invasive species, anthropogenic climate change.

• Twenty-two percent of the world's plant species are threatened, and another 33% have an unknown status.

• Twenty-two species of Australian mammals become extinct between 1900 and 1960. Recently, mammal populations in Kakadu have gone into freefall.

• In the 1950s there were 450,000 lions worldwide and now there are only 20,000. Leopards are down from 700,000 to 50,000, cheetahs from 45,000 to 12,000 and tigers from 50,000 to just 3,000. And in the last forty years, elephant numbers have halved across protected areas in West and Central Africa. Globally, since 1970, wild vertebrate numbers have declined by almost one third.

• One study in 2001 put the annual cost of alien invasive species to the global economy at US$1.4 trillion annually, or about 5% of total GDP.

• Overall, current ecological damage is estimated to cost the global economy US$6.6 trillion annually (yes, with a "t").

• An area of arable land roughly the size of Greece or Nepal is lost to soil erosion and desertification each year. Since 1950, 1.9 billion hectares (4.7 billion acres) of land around the world has become degraded.

• By 1995, humans consumed 20% of global net terrestrial primary production. By 2005, it was 25%.

• Earth overshoot day occurs earlier each year. This is a notional measure designating the point in the year where global consumption exceeds the annual renewable biocapacity of the planet. In 2011, it falls on 27th September. Another way of saying this is that in 2010 the worldwide human population used about 135% of the resources the earth can generate in a year.

• Between 2000 and 2010, the number of cars and motorcycles in China increased twentyfold and there are now between 800 million and one billion cars in the world.

• As we burn 196,442 kilos of coal, 103,881,279 litres of natural gas and 150,179 litres of oil a second, we're dumping 62,500 tonnes of heat-trapping emissions into the earth's atmosphere every minute. Since the industrial revolution, we have increased the carbon dioxide in the atmosphere by more than 40% and increased the acidity of the oceans by 30% (a rate faster than anything seen before in Earth's history). The radiative forcing of the carbon dioxide human activities have put in the atmosphere is the equivalent of adding the energy of more than ten Hiroshima bombs every second and is likely the most significant contributing factor in Greenland losing around 9000 tonnes of ice every second (and accelerating), in about 90% of glaciers globally retreating, in precipitating the largest marine migration in two million years due to warming oceans and in ensuring that the last 318 consecutive months have had a global temperature above the 20th century average. The last month with below average temperatures was February 1985.

• Arctic summer sea ice has declined by 40% in extent and more than 75% in volume over the last three decades and 2011 saw new records for lowest extent and volume since records began. Due to increased summer melt, the fabled North West passage through the remote islands of Canada has been open to commercial shipping without icebreakers only four times in recorded history: 2011, 2010, 2008, 2007.

• Nearly 5.5 billion people (about 80% of global human population) live in an area where rivers are seriously threatened.

• The rate at which we are extracting groundwater has more than doubled between 1960 and 2000 and since 1960 18 trillion tonnes of water have been removed from underground aquifers without being replaced, enough to raise global sea levels by an average of 5 cm.

• In 1960, the Aral Sea was the world's fourth largest lake yet by 2000 it had shrunk to 20% of its original size due to over-irrigation on its feeder rivers.

• We put more than six million tonnes of plastic in the oceans annually, which is something like eight million pieces of litter each day, and over 119,000 items floating on every square kilometre of ocean.

• It is likely humanity has had a greater effect on the nitrogen cycle than any other phenomenon for the last 2.5 billion years.

Note that none of these are projections of present trends, they all relate simply to our present condition. This is currently an unsystematic sample; I have not (yet) tried to cover all of the various ecological and resource crises. This post may grow as I continue to gather more information.
I also posted some further statistics back here, though have not had a chance to post links to all the sources of those, and their credibility is something of a mixed bag.

Over budget and getting worse

Too much of a good thing: "In fact, no phenomenon has probably impacted the nitrogen cycle more than human inputs of nitrogen into the cycle in the last 2.5 billion years".

Another threat to coral: algal blooms, caused by excess nitrogen, found to kill large areas of coral within weeks.

Plane danger? It turns out you are more likely to die from plane exhaust than in a plane crash.

Water, water everywhere: more water flowing into the ocean due to climate change, an 18 percent increase between 1994 and 2006. Another good summary and some discussion on Skeptical Science.

Birds could signal mass extinction: "Biodiversity loss is arguably much more serious and more permanent than climate change". Which is saying something, since anthropogenic climate change is likely to redefine the planet's living systems and geography for millennia.

Loss of old growth forests continues, albeit a little more slowly: where biodiversity and climate converge (one of many places, but this is perhaps the most critical).

Economy vs ecology? Ecological damage estimated to currently cost the global economy US$6.6 trillion (with a "t") each year.

Drying up: unexpected shift in evapotranspiration across large parts of the southern hemisphere.

Finish your plate: 27% of food in the US is wasted. I assume that is not even calculating all the excess calories that are actually consumed.

A second planet by 2030: current trends in consumption are drawing down on the natural capital of the earth. We're currently about 50% over "budget".

And some good news: deadly virus eradicated in "the biggest achievement of veterinary history".

And then there were 306...

NOAA: “August 2010 was the 306th consecutive month with a global temperature above the 20th century average. The last month with below average temperatures was February 1985.” Any day the temperatures for September will be in. It's a safe bet to expect they will make it 307.

The most commonly cited target in international climate negotiations is that we ought to limit warming to an average of 2°C. However, that may already be too high.

How to shrink a city: this will become an increasing issue in many parts of the world due to likely demographic and economic changes of the next few decades.

Peak oil and healthcare, a UK perspective.

Terminological clarification: irreversible vs unstoppable.

Hot Topic: On giving up non-essential flying.

The health benefit of more ambitious emissions targets. If Europe raised its sights from 20% to 30% emissions cuts by 2020, then it could be saving an extra €30 billion per year in health costs. This saving alone would account for a significant portion of the estimated €46 billion p.a. the higher target would require.

Twenty-two percent of the world's plant species are threatened with extinction and another thirty-three percent have an unknown status. The main culprit? Land use changes associated with agriculture.

Rivers in peril worldwide: study in Nature claims that eighty percent of the world's population (nearly 5.5 billion people) lives in an area where rivers are seriously threatened. "[S]ome of the highest threat levels in the world are in the United States and Europe." See also here a graphic of the threat distribution.

Oceans acidifying much faster than ever before in Earth's history.

Soil degradation, erosion and desertification continues in many places around the world, reducing the amount of arable land.

On average, every single man, woman and child on the planet is US$28,000 in debt.

Speaking of money, a new study has estimated that the cost of vanishing rainforest each year is approximately US$5 trillion (with a "t". i.e. US$5,000,000,000,000).

However, the real issue is that each of these crises are not isolated, but are all converging on similar time scales.

An introduction to climate change: graphs and data

Climate change: it's not rocket science; it's considerably more complex.

The sheer mass of data collected across the globe that contributes to a picture of a world being warmed predominantly by human activity is stunning. This is not just surface atmospheric temperatures (which receives the most attention), but atmospheric temperatures at a range of greater heights, ocean temperatures (again, not just on the surface, but at various levels), precipitation patterns, humidity levels, sea ice extent, area and volume, land ice volume and area, glacier flow rates, extent of permafrost, atmospheric levels of carbon dioxide, methane, nitrous oxide and various other greenhouse gases, methane levels in the ocean, acidity of the ocean, migration patterns of birds and insects, flowering dates of hundreds of plant species, emergence dates of hundreds of species of insects, length of growing seasons, geographic distribution and prevalence of thousands of species, river flow rates and peak flow dates, satellite measurements of temperatures and radiation levels - and much, much more! And all this is before we even start talking about the various proxies that give us insight into climate conditions prior to widespread measurements.

With all this supporting data, it's no surprise that 97% of active climatologists think the theory of anthropogenic climate change is the best explanation and that almost every scientific body of national or international standing has been willing to risk their precious reputation by agreeing.

Here is a video that gives you a taste of just some of this enormous store of data and the clear pattern that can be seen throughout. Of course there is regional and annual variation, but the overall picture is apparent to even the untrained eye. If you prefer text, this gives a good brief overview.

See here for the start of a series that gives more of my take on climate change.