Not exact matches
Now, more of the world's governments are turning their attention to
how carbon
emissions might be successfully managed without triggering an undue amount of
negative economic fallout.
The question of
how to limit warming to 1.5 C has been gaining a lot of media attention, especially its almost guaranteed reliance on «
negative emissions» technologies.
The debate over
how to meet the Paris goals «should be broader», the lead author tells Carbon Brief, because there are risks to relying on
negative emissions from BECCS.
The tricky bits as I see it are: issues of glare for passersby / neighbors; working out what hours to deploy it on my roof (or may be to shade my lawn in the middle of a summerâ s day, etc); I would have to work out sun elevations, hours of sunlight in my area, etc to determine
how much visible light should be reflected; and then finally express this as a
negative forcing in W / metre2 to be offset against my presumed calculated positive forcing due to my familyâ s
emissions of GHG, etc..
At first blush, 2070 sounds far away — 50 + years to figure out
how to get
negative emissions (or carbon dioxide removal, «CDR») technology should be no problem... right?
This # 9m scheme is looking at everything from
how feasible
negative emissions technologies will be, to what might happen if we try to use them, as well as the «moral hazard» of assuming such options will become available instead of cutting
emissions faster now.
It remains unclear
how, exactly, the UK could meet a net - zero
emissions goal, with existing pathways relying on
negative emissions to offset continued
emissions from hard - to - tackle sectors, including agriculture and industry.
It has a number of attractive features, including a limited land footprint, the ability to site units near to CO2 storage sites and a clarity around
how much CO2 it sequesters, in contrast to
negative emissions that use biomass.
More precisely, the activities included aim to enable children to: explain the issue of climate change and its impact on children and child rights; explain
how reducing carbon
emissions in industrialized countries can reduce climate change and its
negative effects, and that they can contribute personally to achieving this; and develop skills to undertake action.
By process of elimination, there is net flow of CO2 into vegetation / land (with
emissions from them being overall
negative aside from fuel combustion), which is unsurprising in contexts ranging from a multitude of studies on co2science.org to
how satellite - measured global net terrestrial primary production increased by several percent per decade during the period of global warming (Nemani et al. 2003, for instance).
These models systematically overestimate the
negative effects on growth by making a series of assumptions that constrain
how businesses can respond to the need to cut
emissions.
Also published in Nature Climate Change, a UC Berkeley team shows
how BECCS technology could help enable the transition to carbon
negative power across western North America: «We show that BECCS, combined with aggressive renewable deployment and fossil - fuel
emission reductions, can enable a carbon -
negative power system in western North America by 2050 with up to 145 %
emissions reduction from 1990 levels.»
'' * Hansen does seem to change the priority in determining just
how feasible it is to get substantial
negative emissions.
But it is important for corporate managers to think about
how the long - term pathway to sustainability might involve net -
negative emission reduction targets, and
how early movers can start generating value through carbon removal today.
«We need to start thinking about
how to implement a
negative -
emissions energy strategy on a global scale.
In general, once you have an
emissions budget, there are three additional choices to make:
how to distribute
emissions reductions over time,
how to allocate the budget between CO2 and non-CO2 greenhouse gases, and whether (and to what degree) «
negative emissions» are considered.
One question,
how would a paper which accepted the basic chain of human
emissions - > more CO ₂ in the atmosphere - > warming - > positive feedbacks (water vapour, etc) but then proposed that there were large
negative feedbacks which cancel out most of the effect be counted?
And it's not only about
emissions; it's about adapting to the
negative impacts of climate change that will continue to happen no matter
how fast we reduce
emissions.