As it currently stands, the UN Framework Convention on Climate Change has set a target of limiting the rise in global mean temperature to 2C (3.6F) above pre-industrial levels.
But it seems Apple might have to foot a part of the subsidy bill and take a hit on margins for such a contract to happen. (see Apple Faces China Mobile-Sized Stumbling Block Limiting China Upside Potential) Penetrating China could mean long-term margin pressures as well as the company seeks to compete against the rapidly growing Android market, mitigated to an extent by the carrier subsidies.