T
o meet the challenges of global climate
change, greenhouse-gas emissions must
be reduced.
Emissions from fossil fuels
are the largest contributor to the anthropogenic greenhouse effect, so a reduction in fossil-energy use is a clear priority1
.
Yet,...
More
T
o meet the challenges of global climate
change, greenhouse-gas emissions must
be reduced.
Emissions from fossil fuels
are the largest contributor to the anthropogenic greenhouse effect, so a reduction in fossil-energy use is a clear priority1
.
Yet, because
some emissions will be unavoidable, a responsible strategy also means actively withdrawing
carbon dioxide from the atmosphere2
.
Such
carbon sequestration faces multi-faceted challenges: the net withdrawal of carbon dioxide
must be long term and substantial, the process
must be accountable and must have a low risk
of rapid or large-scale leakage.
One near-term
technology that can meet these requirements
is biochar sequestration.
When combined
with bioenergy production, it is a clean energy
technology that reduces emissions as well as
sequesters carbon3
.
In my view, it is therefore
an attractive target for energy subsidies and for
inclusion in the global carbon market.
An existing approach to removing carbon
from the atmosp
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