Title page

Contents

Background 2

Potential barriers to implementation 13

References 20

Table 1. Land use, land-use change and forestry sector GGR 3

Table 2. Potential source materials for ERW 7

Table 3. Ongoing UK field trials in ERW & published ERW field trials 8

Table 4. Estimates for potential GHG emissions during ERW, primarily based on Brazil case study 14

Table 5. A summary of key policy considerations 19

Figure 1. Simplified diagram showing how enhanced rock weathering may work. Some studies suggest there may be some re-release of carbon dioxide due to... 4

Figure 2. Diagram showing the chemical reactions that occur when silicate rock undergoes enhanced weathering 5

Figure 3. Locations of farmlands and silicate rock resources in the UK. Most of the rock resources are in north-east England, Northern Ireland, and Scotland.... 11

Figure 4. The four main steps of logistics for ERW, which may lead to subsequent GHG emissions. Further discussion in Table 4 12

Boxes

Box 1. UK commitment to Net Zero by 2050 2

Box 2. Brazil Law of Remineralisation 2013 9