in addition the potential impact of technological development on co abatement cost is huge oecd simulations show that the cost of climate change mitigation could be halved from of world gdp to in if renewable technologies would be made competitive in the electricity and nonelectricity sectors oecd if given the ambitious targets both in terms of emission reduction and res deployment and their associated costs ecoinnovation is required in many areas in germany box in particular technological development and increased efficiency of the grid management can both play a central role in the adaptation to higher res supply it will determine at which cost and under what conditions investments will be done which will be crucial not least from a costefficiency point of view but also for public acceptance