\begin{tabular}{lp{\tabwidth}}
\multicolumn{2}{c}{Combustion with CCS} \\
1& {Demonstration plants only; no roll-out of CCS} \\
2& {40\,GW with delivery from mid 2020s -- roughly equivalent to current natural gas and coal.} \\
3& {53\,GW with delivery from beginning 2020s} \\
4& {87\,GW with delivery from beginning 2020s -- build-rate similar to that of gas plants in the 1990s} \\
\end{tabular}
\begin{tabular}{lp{\tabwidth}}
\multicolumn{2}{c}{Nuclear power} \\
1& {No new nuclear power installed; nuclear fades out in 2030} \\
2& {4-fold increase in capacity -- roughly 20 power stations} \\
3& {10-fold increase in capacity -- roughly 60 power stations; equivalent to French build-rate in 1980s} \\
4& {15-fold increase in capacity -- roughly 100 power stations; increase in waste disposal facilities} \\
\end{tabular}
\begin{tabular}{lp{\tabwidth}}
\multicolumn{2}{c}{Onshore wind} \\
1& {11\,GW reducing to zero as decommissioned sites not replanted} \\
2& {Capacity maintained at 20\,GW from 2030 with replanting} \\
3& {26\,GW by 2025 followed by potential delivery of 1.6\,GW/year} \\
4& {34\,GW by 2025 then potential delivery of ~ 1000 turbines / year} \\
\end{tabular}
\begin{tabular}{lp{\tabwidth}}
\multicolumn{2}{c}{Offshore wind} \\
1& {8\,GW reducing to zero as decommissioned sites not replanted} \\
2& {Capacity maintained at 60\,GW from 2040 with replanting} \\
3& {45\,GW by 2025 followed by potential delivery of 5\,GW / year} \\
4& {68\,GW by 2025 then potential delivery of ~ 1200 turbines / year} \\
\end{tabular}
\begin{tabular}{lp{\tabwidth}}
\multicolumn{2}{c}{Hydroelectric} \\
1& {Capacity is maintained at current levels of 1.5\,GW (5\,TWh/y).} \\
2& {Capacity grows slowly reaching 2\,GW (7\,TWh/y) by 2050.} \\
3& {Capacity grows quickly reaching 2.4\,GW (8\,TWh/y) by 2030 and sustained.} \\
4& {Capacity grows rapidly reaching 3.9\,GW (13\,TWh/y) by 2035 and sustained.} \\
\end{tabular}
\begin{tabular}{lp{\tabwidth}}
\multicolumn{2}{c}{Marine} \\
1& {2\,GW reducing to zero as decommissioned sites not replanted} \\
2& {24\,GW by 2050, dominated by wave power} \\
3& {2.8\,GW by 2025 growing to 51\,GW by 2050, dominated by wave and tidal range} \\
4& {16\,GW by 2025, dominated by tidal range. 86\,GW by 2050, dominated by wave} \\
\end{tabular}
\begin{tabular}{lp{\tabwidth}}
\multicolumn{2}{c}{Geothermal} \\
1& {No deployment of geothermal electricity generation.} \\
2& {Capacity grows slowly reaching about 1\,GW (7\,TWh/y) by 2035 and sustained.} \\
3& {Capacity grows quickly reaching about 3\,GW (21\,TWh/y) by 2030 and sustained.} \\
4& {Capacity grows rapidly reaching about 5\,GW (35\,TWh/y) by 2030 and sustained.} \\
\end{tabular}
\begin{tabular}{lp{\tabwidth}}
\multicolumn{2}{c}{Distributed solar PV} \\
1& {No significant capacity of solar PV installed.} \\
2& {Capacity grows modestly reaching 6\,GW (5\,TWh/y) in 2030 and 70\,GW (60\,TWh/y) by 2050.} \\
3& {Capacity grows fast reaching 16\,GW (14\,TWh/y) in 2030 and 95\,GW (80\,TWh/y) by 2050.} \\
4& {Capacity grows exponentially reaching 150\,GW (127\,TWh/y) in 2030; levels off reaching 165\,GW (140\,TWh/y) by 2050.} \\
\end{tabular}
\begin{tabular}{lp{\tabwidth}}
\multicolumn{2}{c}{Distributed solar thermal} \\
1& {As today, only a negligible proportion of buildings have a solar thermal system in 2050.} \\
2& {In 2050, c.30\% of suitable buildings have c.30\% of their annual hot water demand met by solar thermal.} \\
3& {In 2050, all suitable buildings have c.30\% of their annual hot water demand met by solar thermal.} \\
4& {All suitable buildings have c.60\% of their annual hot water demand met by solar thermal.} \\
\end{tabular}
\begin{tabular}{lp{\tabwidth}}
\multicolumn{2}{c}{Micro wind} \\
1& {No significant numbers of micro-wind turbines installed.} \\
2& {Capacity increases to 0.6\,GW (1.3\,TWh/y) by 2020 and sustained.} \\
3& {Capacity increases to 1.6\,GW (3.5\,TWh/y) by 2020 and sustained.} \\
4& {Capacity increases to 4.1\,GW (8.9\,TWh/y) by 2020 and sustained.} \\
\end{tabular}
\begin{tabular}{lp{\tabwidth}}
\multicolumn{2}{c}{The type of fuels from biomass}\\
1& {Mixed fuels} \\
2& {Mainly solid biomass} \\
3& {Mainly liquid biofuels} \\
4& {Mainly biogas} \\
\end{tabular}
\begin{tabular}{lp{\tabwidth}}
\multicolumn{2}{c}{Quantity of bioenergy imported} \\
1& {Biomass imported for energy declines to zero} \\
2& {10-fold increase of imports -- half of the UK's projected market share} \\
3& {20-fold increase of imports -- 100\% of the UK's projected market share} \\
4& {40-fold increase of imports -- 200\% of the UK's projected market share; step-change in yields-per-hectare} \\
\end{tabular}
\begin{tabular}{lp{\tabwidth}}
\multicolumn{2}{c}{The way we use our land} \\
1& {3-fold increase in bioenergy crops production; Livestock numbers remain constant} \\
2& {6-fold increase in bioenergy crops production; Livestock numbers decrease 10\%} \\
3& {No increase in bioenegy crops; Livestock numbers increase 10\%} \\
4& {10-fold increase in bioenergy crops production; Livestock numbers decrease by 20\%} \\
\end{tabular}
\begin{tabular}{lp{\tabwidth}}
\multicolumn{2}{c}{Waste arising} \\
1& {Quantities of waste nearly doubles; levels of waste to landfill increase; emissions remain stable;} \\
2& {Quantities of waste increases by a fourth; landfill nearly eliminated; emissions more than half} \\
3& {Quantity of waste remains stable; landfill eliminated; most waste recycled; emissions reduced by 80\%} \\
4& {As for 3} \\
\end{tabular}
\begin{tabular}{lp{\tabwidth}}
\multicolumn{2}{c}{Marine algae} \\
1& {No development of macro-algae cultivation} \\
2& {Half of Scotlands natural standing macro-algae reserve potential used } \\
3& {100\% of Scotlands natural standing macro-algae reserve potential used } \\
4& {100\% of Scotlands natural standing macro-algae reserve potential used; plus three times same area at offshore developments }
\end{tabular}
\begin{tabular}{lp{\tabwidth}}
\multicolumn{2}{c}{Electricity imports / exports} \\
1& {None beyond current} \\
2& {None beyond current} \\
3& {70\,TWh/y from sunny countries} \\
4& {70\,TWh/y from sunny countries} \\
\end{tabular}
\begin{tabular}{lp{\tabwidth}}
\multicolumn{2}{c}{Storage, demand shifting, backup} \\
1& {3.5\,GW storage \& 4\,GW interconnectors} \\
2& {4\,GW storage \& 10\,GW interconnectors} \\
3& {7\,GW storage, 15\,GW interconnectors and some demand shifting} \\
4& {20\,GW storage, 30\,GW interconnectors \& substantial demand shifting} \\
\end{tabular}
\begin{tabular}{lp{\tabwidth}}
\multicolumn{2}{c}{Average temperature of homes} \\
1& {Average room temperatures increase to 20\degreesC\ (a 2.5\degreesC\ increase on 2007)} \\
2& {Average room temperatures increase to 18\degreesC\ (a 0.5\degreesC\ increase on 2007)} \\
3& {Average room temperatures decrease to 17\degreesC\ (a 0.5\degreesC\ decrease on 2007)} \\
4& {Average room temperatures decrease to 16\degreesC\ (a 1.5\degreesC\ decrease on 2007)} \\
\end{tabular}
\begin{tabular}{lp{\tabwidth}}
\multicolumn{2}{c}{Home insulation} \\
1& {Average thermal leakiness of UK dwellings decreases by 25\% } \\
2& {Average thermal leakiness of UK dwellings decreases by 33\% } \\
3& {Average thermal leakiness of UK dwellings decreases by 40\% } \\
4& {Average thermal leakiness of UK dwellings decreases by 50\% } \\
\end{tabular}
\begin{tabular}{lp{\tabwidth}}
\multicolumn{2}{c}{Geosequestration} \\
1& {Carbon dioxide sequestration rate of 0 tonnes per annum by 2050} \\
2& {Carbon dioxide sequestration rate of 1 million tonnes per annum by 2050} \\
3& {Carbon dioxide sequestration rate of c.30 million tonnes per annum by 2050} \\
4& {Carbon dioxide sequestration rate of c.110 million tonnes per annum by 2050} \\
\end{tabular}