Reuters: The well-attended World Congress on Agroforestry (WCA) in New Delhi last week, with strong contingents from business, government, nonprofits and academia - and a blog that drew more than 35,000 readers - is the latest evidence of the huge momentum the concept has gained in recent years. Of course agroforestry is not new: people have been growing food crops and trees together for millennia. But as the social and environmental costs of intensive farming and commercial forestry have become more evident,...