Burning wood under fire: Are forests going up our chimneys?

To meet the EU's renewable energy target, countries have rediscovered wood as a fuel. But conservationists fear this new hunger for wood might have disastrous consequences — for the forests, the people and the climate.

You may think that conservationists would be happy with the European Union's (EU) goal to switch from fossil fuels to renewable energy. However, the reality of the issue is not that simple.

Environment | 03.01.2014

They claim that a new demand for wood is driving deforestation and boosting carbon dioxide levels, as well as dangerous particulate matter emissions.

The EU Renewable Energy Directive from 2009 requires member states to include renewables in 20 percent of their energy needs by 2020.

This week, the European Parliament's Committee on Industry, Research and Energy (ITRE) voted to increase the renewable energy target to 35 percent by 2030 and to introduce an additional target for renewable heating.

Americas | 30.01.2014

But while some renewable energy supporters across Europe are celebrating, others are horrified.

Brown gold

In 2015, biomass accounted for about two thirds of the EU's renewable energy consumption, with wood and wood products making up about half of the used products.

Compared to other biomasses derived from plants, like leaves and stalks, wood's higher mass density means more energy can be stored in the same volume, making it a perfect fuel for power plants and heaters. 

FSC Siegel Baumstämmen

Wood has become a much wanted resource

According to a study commissioned by the NGOs Birdlife Europe, Forests and the European Union Resource Network (FERN) and Transport & Environment, the use of wood for energy purposes increased by about 75 million cubic meters between 2010 and 2015 — an uptick of 21 percent.

But they claim that the use of wood waste from the forest industry has gone up by only 10 percent, whereas the use of wood coming directly from the forest has increased by 24 percent.

The initial idea of the EU's policy was to produce energy from residues, says Linde Zuidema from FERN — for example from the parts of a tree that can't be used for furniture and other products. "But in some areas in Europe, it is leading to increased harvest," she says. 

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According to FERN, Slovakia's and Romania's forests are being chopped down to meet the EU's newly-risen demand for wood. 

Zuidema is urging the EU to recognize that even though wood is a renewable source of energy, "it is a limited resource."

England North Yorkshire Drax Kraftwerk nahe Selby

Drax Power Station near Selby in England generates electricity from burning wood

Going big — and international

Some countries - including the UK, the Netherlands, Belgium and Denmark - have built new wood-fired plants or converted coal-fired plants to produce electricity from burning wood.

Drax power station in North Yorkshire, England, is the UK's biggest power plant and provides about 7 percent of the country's electricity. The company boasts that it generates 70 percent of its electricity from compressed wood pellets rather than coal. But part of their wood source comes from the US.

Read more: How the EU's green energy drive is hitting US forests

"The USA is now the main supplier of wood pellets to Europe," US and Dutch researchers write in the journal Biofpr - Biofuels, Bioproducts and Biorefining.

European pellet consumption reached 7.3 million tons in 2015, with about 4.6 million tons being imported from the southeastern US.

Bildergalerie Holzpellets USA

Wood-pellet production in North Carolina, US

How climate-friendly is it really?

When power plants burn wood, they can claim to emit zero carbon dioxide. 

In practice that's not true of course, and depending on the water content of the wood, wood-burning furnaces might emit even more CO2 than coal-burning plants per unit of electricity produced.

The popular notion is that if you cut down a tree, burn it and plant a new tree in its place, you are simply recycling carbon.

But as Zuidema points out, "forests and trees have a very important role to play while they are alive and standing in the forest as a carbon sink."

Cutting down trees that are still sequestering carbon is a big mistake, she says — even if young trees might indeed replace the older ones one day: "Forest biomass is not carbon-neutral at all."

Just like coal, burning wood generates fine particulates that might cause health problems and even death.

In Germany, particulate emissions from small wood-burning units can even exceed the ones coming out of the engines of cars and trucks. 

Together with other conservationists, Zuidema wants the focus to stay on solar and wind energy to replace fossil fuels.


Conservationists fear the hunger for wood may harm our forests

The wood divide

But some researchers are still divided on the issue. 

In February 2016, 65 US scientists sent a letter to the US Senate warning that following the EU's lead in giving forest biomass a carbon-neutral label could lead to serious harm.

But only a month later, more than 100 scientists took the opposite view when writing to the Environmental Protection Agency (EPA), claiming "that the carbon benefits of sustainable forest biomass energy are well established."

In a simulation study, researchers concluded that an increased demand for wood fuel could cause ecosystems in North Carolina to shrink by about 10 percent until 2050, replacing natural hardwood and pine habitats with intensively managed forests.

Still, others presume that this new hunger for wood will have a positive effect, creating incentives for landowners to grow trees and properly manage forestries.

"Forests in Europe remain stable"

As far as logging in Germany goes, Matthias Dieter, director of the Institute of International Forestry and Forest Economics in Hamburg, gives the all-clear.

"The forest area and its biodiversity in Germany are growing," he tells DW.

Fuel wood used in Germany comes from sustainably managed forests, Dieter points out. "We don't have any major imports of fuel wood from other countries."

He says that "the forests in Europe remain stable."

So burning wood doesn't need to be catastrophic for the environment — if done in the right way.

Holzpellets Flash-Galerie

Make sure you know the origin of your wood pellets

"In Germany, wood pellets are produced exclusively from waste in saw mills," Anna Katharina Sievers of the German Energy Wood and Wood Pellet Association" (DEPV) tells DW, adding that the capacity for wood pellets clearly exceeds the demand.

But Sievers admits that some criticisms of the international wood pellet market are "justified," so consumers should make sure to do their research before buying a product. 

One big question remains though: What would happen if more people in Germany suddenly decided to install wood pellet-based heating?

During the COP23 in Bonn, China and 18 other nations announced plans to increase the use of wood and other plant matter as a means of generating electricity. 

Announcements like this have left some conservationists deeply worried that if too many countries follow the example of the EU, the situation will only get worse.

Nature and Environment

Pest control - or profit?

In March 2016, the Polish government decided to triple the amount of logging allowed in the Bialowieza forest. Since then, at least 10,000 trees have been felled. The government says the reason for the deforestation was to fight an infestation of bark beetles. But scientists say the insects only affect conifers. Critics say pest control is just a cover for those who stand to benefit economically.

Nature and Environment

The alleged 'baddie'

The bark beetle loves to eat spruce, which is known as the queen of the conifers. But scientists say we shouldn't fell spruce trees, even if they're infected with beetles. They provide a habitat for worms, insects and fungi, and the dead tree trunks are used as nesting sites by woodpeckers.

Nature and Environment

A large scale operation

The Bialowieza forest spans Poland and Belarus. 35 percent of the forest on the Polish side of the border is made up of protected national parks and nature reserves. The government says logging only happens in cultivated areas, rather than natural old-growth forest. But activists say the clearance is far more extensive.

Nature and Environment

Last of its kind

The European bison is the last surviving species of wild cattle on the continent - and the Bialowieza forest is home to Europe’s largest free-roaming herd. As early as 1795, the Russian Tsar put the area under strict protection. Poachers were even sentenced to death by poisoning.

Nature and Environment

Colorful inhabitant

The Syrian woodpecker is one of 1,200 animal species living in the forest. Originally from the Middle East, it arrived in Europe around a century ago with a taste for cherries and nuts.

Nature and Environment

Save the trees

For hundreds of years, the 150,000-hectare forest was left in peace. And it should stay that way, environmentalists say. The Polish government has closed off the logging area in an attempt to avoid disturbances from activists. And police and forest management security personnel supervise any protests to make sure activists don't chain themselves to the machinery.

Nature and Environment

A warning from the EU

The clearing of Bialowieza forest has also become an issue outside of Poland. Recently, activists in Berlin protested against it. Now even the EU is getting involved, warning that logging activity may be added to the ongoing EU treaty violation proceedings against Poland if the country doesn't stick to the commission's deforestation ban.

Nature and Environment

Trees are friends

This young man's method of protesting won't get him into trouble. But seven other activists have arrested after interfering with wood harvesters. They face penalties and imprisonment due to a "breach of the peace".

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