Reuters: Seventy percent of firms with revenue of $1 billion or more say they plan to increase spending on climate change initiatives in the next two years, a global survey reported on Tuesday. Nearly half of the 300 corporate executives who responded to a survey conducted for the accounting and consulting giant Ernst & Young said their climate change investments will range from 0.5 percent to more than 5 percent of revenues by 2012. More than four out of five respondents, or 82 …