The ABC of climate change: Brundtland report

The Brundtland report is probably the most famous document regarding sustainable development. The report, officially titled “Our Common Future”, was published in 1987 by the World Commission on Environment and Development (WCED) under the lead of former Prime Minister of Norway Gro Harlem Brundtland.

The 300-pages long report coined and defined the term sustainable development for the first time as a broad economical and ecological concept. Although it had been used before with regard to sustainable forestry and fisheries, it was not until the release of this document that economic and ecological policies were linked in an integrated framework.

By now, the document’s definition has become famous, quoted in countless studies, reports and policy documents around the world. Chances are high you have come across it yourself already.

Sustainable development is development that meets the needs of the present without compromising the ability of future generations to meet their own needs.

Personally I don’t think it’s the best definition to quote from the report, but it might have to do with the fact that it is the very first sentence of the chapter that introduces the concept of sustainable development. Less abstract is article 15 of that same chapter 2:

In essence, sustainable development is a process of change in which the exploitation of resources, the direction of investments, the orientation of technological development; and institutional change are all in harmony and enhance both current and future potential to meet human needs and aspirations.

The famous Brundtland report was published in 1987 and meant a turning point in global ecological policy-making

The famous Brundtland report was published in 1987 and meant a turning point in global ecological policy-making

By using the first definition, all too often the focus shifts to the now-future relation; we have to live and consume now such that the future generations are not compromised. It is essential though that the document also stresses that sustainability demands equity among all within one generation.

A world in which poverty and inequity are endemic will always be prone to ecological and other crises.

This is strikingly similar to what Pope Francis wrote in his encyclical Laudate Si last year. Ecological crises can simply not be seen decoupled from social and humanitarian wrongs. Everything is interconnected.

The Brundtland report laid the foundations for the famous Earth Summit in Rio de Janeiro five years later. It became an environmental conference of unseen scale, with more than hundred heads of state present.  The conference was a major step forward, with the Convention on Biological Diversity, the Framework Convention on Climate Change (UNFCCC), Agenda 21 and so on.

Since then, countries have been meeting yearly during climate conferences, also known as “COPs”, Conferences of the Parties. Soon those conferences turned into a diplomatic arena for developed versus developing countries. Finally, in December 2015 they reached an internationally binding agreement on how to tackle climate change.

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Morocco unleashes the force of the sun

 

In case you didn’t notice it yet: solar power is booming. Last week saw another milestone, with Morocco opening its Ouarzazate [wa-za-zat] concentrated solar power utility. Being the largest utility of its kind in the world, the town Ouarzazate — known from movies and TV shows like Lawrence of Arabia and Game of Thrones— kicks off what could become a revolution in solar power. It’s the first step of Morocco’s King Mohammed VI’s dream to turn his country in a renewable energy hub.

In contrast with photovoltaic solar power technology, concentrated solar power (CSP) is less known. This is how it works. Big parabolic mirrors focus the sun’s rays onto tubes filled with a fluid that heats up and transports the heat towards a central hub where it creates steam to drive a turbine. That way the solar energy is used to generate electricity.

What is so particularly interesting about this technology is that it can be combined with temporary energy storage. During the day, part of the hot fluid is used to heat up molten salt stored in large tanks. Those stay warm hours after sunset to keep the turbine running during the evening. The technology is very promising for countries with a lot of sun hours — in fact so promising that the International Energy Agency estimates that by 2050 11% of world’s electricity will come from CSP.

The Ouazazate concentrated solar power plant is the first in Morocco's plan to build out its renewable energy supply (photo: Digitaltrends)

The Ouazazate concentrated solar power plant is the first in Morocco’s plan to build out its renewable energy supply (photo: Digitaltrends)

The first phase that opened last Thursday provides 160 MegaWatts of what will become a total 580MW by 2018 when the construction will be finished. The 35 soccer fields big plant powers 650 thousand people and avoids 240 thousand tons of CO2 emissions every year, the equivalent of 80 000 cars.

It is the proof that Morocco takes its climate pledge in Paris in December last year very seriously. By 2020 it aims to get 42% of its electricity generation from renewables, by 2030 it wants to have its CO2 emissions 32% below the business-as-usual scenario. And of course they want to make a good impression, being the host of this year’s climate summit.

The project has its price tag of course. Nearly 4 billion US dollar has been invested, half of which comes from German investment bank KfW, the European Investment Bank and the World Bank. Climate Investment Funds (CIF) calculated that for every 1 GigaWatt additional solar power installed, electricity production costs could fall by 3%. “Morocco is showing real leadership and bringing the cost of the technology down in the process.” told a manager of CIF to the Guardian. Keep up the good work Morocco!

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Japan’s floating solar farms

Japan relied on nuclear energy to feed its energy hungry industry and population for many years. With 50 nuclear reactors, atomic energy provided 28% of its electricity needs. Everything changed after the Fukushima Dai-Ichi accident in the wake of the 2011 devastating earthquake and tsunami. After significant release of radioactive material in the environment and the evacuation of a zone around the power plant of 630 km², Japan’s government decided to take out all its other nuclear plants out of operation under huge public pressure.

Withdrawing one of their major energy sources meant they had to look for alternatives.  The country started to import fossil fuels on a massive scale. Nearly 90% of the electricity is now generated based on natural gas, oil and coal. Japan suddenly became the biggest importer of LNG (liquid natural gas) and second importer of coal, after China. The move undid all the greenhouse gas reduction efforts of the last decade. Recently some nuclear reactors have started up again, after safety upgrades imposed by the government. Due to the heavy public resistance, it is unlikely that Japan will turn back to nuclear power and its original emission reduction ambitions soon. Luckily, there is another option: renewables.

There is one big problem with Japan though: it is so small. Land is precious on the mountainous island, which doesn’t leave much room for large scale solar or wind projects.

Kyocera's floating solar farm will deliver electricity for around 5000 households (photo: Kyocera Corp.)

Kyocera’s floating solar farm will deliver electricity for around 5000 households (photo: Kyocera Corp.)

Electronics company Kyocera has come up with a good compromise: build floating solar farms on large water reservoirs. With 50 000 panels, their latest project on the Yamakura dam reservoir would be good for 13.7 MegaWatt  — enough to power nearly 5000 households. It’s not the first of its kind, but when finished it will be the biggest one in electricity production.

Water and electricity are not best friends, so the electrical equipment needs to be sealed carefully. On the other hand, a floating solar farm doesn’t need the heavy steel frames as on land.

cover photo by aotaro

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On the future of chocolate

photo: Divine Chocolate

Wandering through the Galeries Royales de Saint-Hubert in the heart of Brussels can be a torture for chocolate-lovers (and who’s not?). Many famous Belgian chocolateers have a shop in this 19th century shopping arcade. Think Neuhaus, Léonidas, Godiva… Behind the windows, chocolate in all possible forms and shapes are displayed to lure you inside. The shop keepers are keen to let you try some of this delicous good that the Incas called food of the gods. It becomes very difficult not to spent all the money you have with you -some indeed do. And apperently we don’t have to go to the temples of chocolate to be tempted to buy it. Global sales are growing rapidly now chocolate becomes increasingly popular in China and South-America. Is this growing demand for chocolate a big deal? As long as supply follows demand there’s nothing to worry about, right? But that’s exactly where the problem lies.

(more…)

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The ABC of climate change: Atmospheric lifetime

The atmospheric lifetime of a greenhouse gas refers to the approximate amount of time it would take for the anthropogenic increase (i.e. increase due to human behavior) to an atmospheric pollutant concentration to return to its natural level. That can happen as a result of either being converted to another chemical compound or being taken out of the atmosphere via a so-called sink. The lifetime depends on the pollutant’s sources and sinks as well as its reactivity.

The lifetime of a pollutant is often considered together with the mixing of pollutants in the atmosphere –a long lifetime will allow the pollutant to mix throughout the atmosphere. Average lifetimes can vary from about a week ( e.g. sulfate aerosols, small particles in a gas) to more than a century (e.g. carbon dioxide). The chart below shows the atmospheric lifetime of four common greenhouse gases.

In the graph you see that carbon dioxide is hanging around in the atmosphere for quite a long time after we emit it, longer than other greenhouse gases like methane. But you may have heard people talking about methane being 20 times or even 50 times stronger than carbon dioxide. Such statements are quite misleading without further clarification. In fact, that’s the reason why scientist have come up with something called the Global Warming Potential, which looks at the overall effect of a greenhouse gas over the timespan of 100 years after it has been emitted. Even though methane has disappeared after 12-15 years, the net effect is still 23 times stronger than carbon dioxide!

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Photo of the Week: the Rain maker

We write December 2015, with the new year around the corner. Yet, still 780 million people around the world have no access to clean and safe drinking water. That is 1 out of 9! Since many communities life at or near the shore, the vast amount of seawater nearby plead to be turned into the source of life. Until now various machines have been proposed to take the salt out of seawater. This desalination process happens to be expensive, both money and energy wise.

The best solutions to difficult problems are often found in nature. Same goes for the Rain Maker, the desalination machine that mimics the natural water cycle. It heats seawater until it vaporises. The water vapour is taken into another compartment to be distilled. Then the steam is cooled down and turns into water again. Via a smart design, most of the heat is recuperated.

Prototype of the Rain Maker. It turns seawater in drinking water in a matter of minutes (photo: Billions in Change)

Prototype of the Rain Maker. It turns seawater in drinking water in a matter of minutes (photo: Billions in Change)

No membranes or filters are used, making the device able to run on its own for months without human intervention. A machine the size of a small car can make more than 3500 litres of water an hour.

By building small units that can be mass produced, the price is reduced enormously. Depending on the specific needs, more or less Rain Makers can be combined. This makes a desalination machine finally cost effective. Current massive plants are designed case by case and just cost too much money. The builders of Rain Maker even propose to build a ship full of their desalinators. When a coastal area faces a water crisis, the ship rushes to the spot and can start producing clean drinking water straight away and pump it to the shore.

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Showcased in Billions in Change documentary

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