PARIS (AFP) — Wall Street's sickness and its contagiousness for the world economy are bad news for the already faltering effort to craft a new pact to tackle climate change. Tighter budgets, shrinking corporate profits and worries about jobs could crimp manoeuvering room at upcoming UN talks on toughening curbs on greenhouse-gas emissions, sources say. But -- so far, at least -- the crisis does not appear to be having an impact on investment in clean technology, say these sources. Indeed, some are confident that spending on wind, solar and other renewables may even rise.