San Francisco Chronicle: The financial crisis and a deepening economic downturn are threatening to delay efforts to deal with another pressing global crisis: climate change. Hopes for action had been running high since both Republican John McCain and Democrat Barack Obama had pledged to make cutting U.S. greenhouse gas emissions a top priority. But environmentalists now fear that the next president may be more focused on reviving a flat-lining economy, and Congress could be wary of supporting any measures …