Navigation Links
CO2 removal can lower costs of climate protection
Date:4/12/2013

According to the analysis, carbon dioxide removal could be used under certain requirements to alleviate the most costly components of mitigation, but it would not replace the bulk of actual emissions reductions.

"Carbon dioxide removal from the atmosphere allows to separate emissions control from the time and location of the actual emissions. This flexibility can be important for climate protection," says lead-author Elmar Kriegler. "You don't have to prevent emissions in every factory or truck, but could for instance plant grasses that suck CO2 out of the air to grow and later get processed in bioenergy plants where the CO2 gets stored underground."

In economic terms, this flexibility allows to lower costs by compensating for emissions which would be most costly to eliminate. "This means that a phase-out of global emissions by the end of the century - that we would need to hold the 2 degree line adopted by the international community - does not necessarily require to eliminate each and every source of emissions," says Kriegler. "Decisions whether and how to protect future generations from the risks of climate change have to be made today, but the burden of achieving these targets will increase over time. The costs for future generations can be substantially reduced if carbon dioxide removal technologies become available in the long run."

Balancing the financial burden across generations

The study now published is the first to quantify this. If bioenergy plus CCS is available, aggregate mitigation costs over the 21st century might be halved. In the absence of such a carbon dioxide removal strategy, costs for future generations rise significantly, up to a quadrupling of mitigation costs in the period of 2070 to 2090. The calculation was carried out using a computer simulation of the economic system, energy markets, and climate, covering a range of scenarios.

Options for carbon dioxide removal from the atmosphere include afforestation and chemical approaches like direct air capture of CO2 from the atmosphere or reactions of CO2 with minerals to form carbonates. But the use of biomass for energy generation combined with carbon capture and storage is less costly than chemical options, as long as sufficient biomass feedstock is available, the scientists point out.

Serious concerns about large-scale biomass use combined with CCS

"Of course, there are serious concerns about the sustainability of large-scale biomass use for energy," says co-author Ottmar Edenhofer, chief-economist of PIK. "We therefore considered the bioenergy with CCS option only as an example of the role that carbon dioxide removal could play for climate change mitigation." The exploitation of bioenergy can conflict with land-use for food production or ecosystem protection. To account for sustainability concerns, the study restricts the bioenergy production to a medium level, that may be realized mostly on abandoned agricultural land.

Still, global population growth and changing dietary habits, associated with an increased demand for land, as well as improvements of agricultural productivity, associated with a decreased demand for land, are important uncertainties here. Furthermore, CCS technology is not yet available for industrial-scale use and, due to environmental concerns, is controversial in countries like Germany. Yet in this study it is assumed that it will become available in the near future.

"CO2 removal from the atmosphere could enable humankind to keep the window of opportunity open for low-stabilization targets despite of a likely delay in international cooperation, but only under certain requirements," says Edenhofer. "The risks of scaling up bioenergy use need to be better understood, and safety concerns about CCS have to be thoroughly investigated. Still, carbon dioxide removal technologies are no science fiction and need to be further explored." In no way should they be seen as a pretext to neglect emissions reductions now, notes Edenhofer. "By far the biggest share of climate change mitigation has to come from a large effort to reduce greenhouse-gas emissions globally."


'/>"/>

Contact: Jonas Viering
press@pik-potsdam.de
49-331-288-2507
Potsdam Institute for Climate Impact Research (PIK)
Source:Eurekalert

Related biology news :

1. Waste removal in worms reveals new mechanism to regulate calcium signaling
2. Controversial dam removals founded on value conflicts
3. Tracking sediments fate in largest-ever dam removal
4. New research lowers past estimates of sea-level rise
5. Lower dosage CT-guided lung biopsy protocol maintains quality, minimizes exposure
6. Crestor Delivers Latest LDL-C Targets in High-Risk Patients at Lower Doses than Other Statins
7. Study finds circle hooks lower catch rate for offshore anglers
8. UGA scientists reveal genetic mutation depicted in van Goghs sunflower paintings
9. Genetic mutation depicted in van Goghs sunflower paintings revealed by scientists
10. Scientists discover switch in plants to create flowers
11. Bay Area PV Consortium announces $7.5 million in grants to lower the cost of large-scale solar
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/22/2016)... 22, 2016 ... the "Global Biometrics Market in Retail ... --> http://www.researchandmarkets.com/research/p74whf/global_biometrics ) has ... Biometrics Market in Retail Sector 2016-2020" ... Research and Markets ( http://www.researchandmarkets.com/research/p74whf/global_biometrics ) ...
(Date:1/20/2016)... , Jan. 20, 2016  Synaptics Incorporated (NASDAQ: ... interface solutions, today announced sampling of S1423, its ... wearables and small screen applications including smartwatches, fitness ... Supporting round and rectangular shapes, as well as ... performance with moisture on screen, while wearing gloves, ...
(Date:1/13/2016)... , January 13, 2016 ... the addition of the  "India Biometrics ... & Forecast (2015-2020)"  report to ... ) has announced the addition of ... Market - Estimation & Forecast (2015-2020)" ...
Breaking Biology News(10 mins):
(Date:2/4/2016)... 2016 Beike Biotechnology, the Shenzhen ... a ceremony in late 2015 to mark their successful ... 2016. --> --> ... Personalized Cell Therapy" was hosted by the Shenzhen Cell ... subsidiaries of Beike Biotechnology Co., Ltd. ...
(Date:2/4/2016)... -- --> --> Q ... to provide the following update on recent corporate developments. ... 3 months we have significantly increased our cash position through ... a result, we have positioned ourselves to execute on the ... expect that development to continue on schedule. ...
(Date:2/4/2016)... Sinovac Biotech Ltd. ("Sinovac" or the "Company") (NASDAQ: ... China , today announced that the ... February 4, 2016 a preliminary non-binding proposal letter, dated ... V-Ming ( Shanghai ) Investment Holdings Co., ... Shenzhen ) Fund Management Co., Ltd., Beijing ...
(Date:2/4/2016)... ... , ... Many of the engineers at FireflySci, Inc. have been manufacturing quartz ... from other cuvette manufacturers is their supercharged customer service and their extensive database of ... steady flow of inside information, they have recently revamped their manufacturing techniques to reduce ...
Breaking Biology Technology: