If an emission reduction agreement with participation of all players is not enforceable because politicians are too myopic or costs of reducing emissions are too high, strategic investments in research and development (R&D) of green technology, for example, sustainable drivetrains, can pave the way for a future treaty. Although no player will rationally reduce emissions on its own, investments in R&D by at least one player can change the strategic situation of negotiations to control emissions: emission abatement costs will decrease so that a treaty with full participation can be achieved in future periods through time consistent sustainable policies.
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