And closer study of biomass burning is calling into question the «carbon - neutral» assumption: that growing wood or
other biomass captures the same amount of CO2 that subsequent burning for electricity generation releases.
Not exact matches
Instead of sending that CO2 back into the atmosphere when the
biomass is burned, BECCS facilities
capture the emissions and either store them or use them for some
other purpose.
One questioner suggested that
biomass was not a particularly good way of removing carbon from the atmosphere, as growing trees usually takes too long for it to be effective, although
other participants thought that fast growing trees were a good way of
capturing carbon.
Some forms of carbon removal are also subject to significant debate, such as whether bioenergy with carbon
capture and storage (BECCS)-- which involves burning
biomass like crop wastes for energy and
capturing and storing the carbon emissions underground in geological formations — can be truly sustainable at a large scale given competing needs for land, among
other concerns.
The most likely method of achieving negative emissions,
biomass with carbon
capture and storage (BECCS), is controversial because it might require very large areas of land to be set aside for fast - growing trees or
other biomass crops.
Net - zero emissions will require carbon
capture and storage (CCS) for all fossil fuels and
other technologies (e.g.,
biomass with CCS or direct air
capture) for residual emissions from fossil fuel extraction and from
other anthropogenic sources such as agriculture.