En-ROADS does not include possible geoengineering methods such as solar radiation management at this time.
One way to approximate a test of a geoengineering approach in En-ROADS would be to lower the climate sensitivity assumption in the model. Climate sensitivity measures how much global temperature will increase per doubling of atmospheric CO₂ equivalents. Some forms of geoengineering might make global temperature change less sensitive to the rise in carbon emissions. You can access this setting by clicking Simulation in the top menu, selecting Assumptions, and then altering the “Climate sensitivity” slider.
En-ROADS does include carbon dioxide removal (CDR) methods (removing carbon dioxide from the atmosphere, for example through bioenergy with carbon capture and storage, or direct air capture), and these are included in the “Technological Carbon Removal” slider and its advanced settings. To learn more about CDR in En-ROADS, read this FAQ: How do I simulate Carbon Dioxide Removal (CDR)?
When it comes to solar radiation management (SRM) and similar geoengineering strategies, the potential risks are poorly understood, and so we are not ready to add them to the model at this time. For example, it is anticipated that SRM could shift rainfall patterns worldwide, creating winners and losers. Capturing that impact and the necessary equity/diplomatic considerations that would need to be wrestled with if SRM is deployed is not something that En-ROADS is designed for.
An additional problem with SRM and similar approaches is that they would not remove greenhouse gases from the atmosphere. Greenhouse gas accumulation in the atmosphere has additional effects besides increasing temperature. The higher carbon dioxide level in the atmosphere is leading to ocean acidification, posing a tremendous threat to ocean life and the economies that depend on it. SRM would not change the continuing ocean acidification.