Question raised in Lok Sabha on Implementation of INDCs, 09/08/2016. India, in its Intended Nationally Determined Contributions (INDCs), has committed to reduce the emissions intensity of its GDP by 33 to 35 percent by 2030 from 2005 level.
This paper focuses on the risks associated with “negative emission” techniques for drawing carbon dioxide from the atmosphere through photosynthesis and storing it in land-based sinks or underground. It examines what these risks may imply for near-term actions to limit warming to 1.5°C or 2°C above pre-industrial levels.
Planetary warming may be exacerbated if it accelerates loss of soil carbon to the atmosphere. This carbon-cycle–climate feedback is included in climate projections. Yet, despite ancillary data supporting a positive feedback, there is limited evidence for soil carbon loss under warming. The low confidence engendered in feedback projections is reduced further by the common representation in models of an outdated knowledge of soil carbon turnover.