Alex1Powell Authors Glen Peters
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The anatomy of a scenario...
A 𝘁𝗵𝗿𝗲𝗮𝗱 on how mitigation works, why we probably need some level of carbon capture & storage (CCS) & carbon dioxide removal (CDR) - just not as much as in scenarios.
Based on my presentation ↦ https://t.co/j5uLxUi0xF
2. We start with a baseline or reference scenario, that assumes no or limited mitigation. If we want to stay "well below 2°C" we need to get rid of the dark grey & be net-zero!
We can argue about the baseline, but for the purposes here, it doesn't matter https://t.co/C0dAdj65tl
3. The heavy lifting is done by conventional mitigation: behavioural change, energy efficiency, fuel switching (fossils to non-fossils), changed transport, dematerialisation, etc, etc...
But, scenarios suggest this is not enough to get rid of all greenhouse gases.
4. In some sectors, particularly some industrial sectors, perhaps the cheapest or only way to mitigate is with carbon capture & storage (CCS), eg, cement, steel, chemicals, etc
This is one reason we need CCS...
5. We can't forget about non-CO₂ emissions. We can probably get most non-CO₂ out of industry, but what about agriculture? Even if we change diet, reduce food waste, etc, we may not be able to eliminate CH₄ or N₂O from agriculture.
Some CO₂ & non-CO₂ remains (dark grey)...
A 𝘁𝗵𝗿𝗲𝗮𝗱 on how mitigation works, why we probably need some level of carbon capture & storage (CCS) & carbon dioxide removal (CDR) - just not as much as in scenarios.
Based on my presentation ↦ https://t.co/j5uLxUi0xF
2. We start with a baseline or reference scenario, that assumes no or limited mitigation. If we want to stay "well below 2°C" we need to get rid of the dark grey & be net-zero!
We can argue about the baseline, but for the purposes here, it doesn't matter https://t.co/C0dAdj65tl
3. The heavy lifting is done by conventional mitigation: behavioural change, energy efficiency, fuel switching (fossils to non-fossils), changed transport, dematerialisation, etc, etc...
But, scenarios suggest this is not enough to get rid of all greenhouse gases.
4. In some sectors, particularly some industrial sectors, perhaps the cheapest or only way to mitigate is with carbon capture & storage (CCS), eg, cement, steel, chemicals, etc
This is one reason we need CCS...
5. We can't forget about non-CO₂ emissions. We can probably get most non-CO₂ out of industry, but what about agriculture? Even if we change diet, reduce food waste, etc, we may not be able to eliminate CH₄ or N₂O from agriculture.
Some CO₂ & non-CO₂ remains (dark grey)...