“Switchable Solvents,” recently discovered by Philip Jessop (Queens University, Canada) and David Heldebrant (Nature, 2005, 436, 1102), show promise as attractive CO2 capture and transfer agents. The alcohol/amidine or guanidine liquid blend chemically binds CO2 at any CO2 pressure to form an ionic amidinium (R2 = C) or guanidinium (R2 = N) alkylcarbonate salt, which is liquid at room temperature (ionic liquid, Figure 1). Switchable Solvent systems are liquid, non-corrosive CO2 trapping agents, whether CO2 is bound or not. The homogeneous liquid phase without a precipitate offers tremendous engineering advantages compared to corrosive liquid, solid or multi-phase chemical trapping agents. Switchable Solvents can be regenerated with gentle heating (50 ˚C) under N2, releasing bound CO2. The release of CO2 is also attainable at room temperature by sparging the system with N2, however the rate of CO2 release is much slower. Switchable Solvents are highly tunable, reversible, and recyclable.