Burning wood waste is primarily a green washing method. True tree waste is very minimal today in quantity, and most wood "waste" is actually used for a lot of products like paper and ply wood, and what is left to burn when everything is used are not enough to power a nation for any duration. In term of pollution it reduces air quality, and in term of sustainability there aren't enough forests around to use wood as the main fuel for all the power needs we have when renewables can't deliver.
Burning wood has at best similar environmental impact as beef. In theory it can be produced using just "waste", but we have to extend the word "waste" beyond recognition when production is scaled up and the profit-maximizing locusts become part of the picture. The world is suffering from deforestation.
We are not talking about using garden waste to burn a log in a open fire place, but rather grid sized power plants and central heating plants. I should however mention that there are air quality reports that points to issues with individual homes burning wood inside cities. Open air fireplaces do not scale well with dense population areas.
> Cutting down massive amount of forests just for the purpose of burning it up is harmful to the environment
Err, lets perhaps stick with
* Cutting down massive amount of old growth forest is harmful to the environment ( whether it's for burning or bauxite )
and
* Cutting down forest faster than regrowth rate is harmful to the environment (as that's net loss wrt surface sequestration)
and perhaps examine "harmful to bio diversity" (is it? checker-boarded plantation forest has about the same biodiversity as it ever has - it's not old-growth but it's not devoid of life or diversity), "dangerous to humans" (really? with modern logging machines on plantation forest? - the deaths in logging largely come from non plantation clearing on steep slopes and happen to humans aware of the risks)
> True tree waste is very minimal today
Is it? Many people hereabout heat their homes from limb lopping, dead fall, and tree deaths.
> not enough to power a nation for any duration
I don't recall suggesting powering a nation - just pointing out that there's an acceptable attrition rate for forests.
The harm from deforestation comes from multiple sources. It increase the harmful effect of storms, flooding, and perhaps counter intuitively also forest fires.
Modern plantation forest involve draining of water, and that causes green house gases to be released. After logging, the area also release more green house gases during the first 20 years then they pick up. Logging also changes the level of ground water, and how much of the ground water get filtered, which in turn reduces quality of the water downstream. Logging also increase erosion, which has it own set of risk to humans.
> I don't recall suggesting powering a nation - just pointing out that there's an acceptable attrition rate for forests.
The article is about nuclear power plants, in the context of the UK green party. In order for wood to be an alternative it would need to be able to provide energy in a green, sustainable, and national independent way. Power plants that burn wood pellets do exist, but how green and how sustainable they are is debatable. It also questionable if they will just use wood, or if they mix it in with other even less green and less sustainable fuels, but sells the energy as green energy produced on waste products.