Wall Street Journal: The economic downturn has hit investment in clean energy projects, increasing the gap between expectations and commitments to save the planet. New investment in clean energy has plummeted to $13.3 billion in the first quarter 2009, a decline of 44% over the previous quarter and of 53% compared to the first quarter of 2008, says a new report by New Energy Finance, a UK-based organization that provides industry information and analysis to investors, corporations and governments on clean …