You might think that this is just another symptom of a warming world. But an expert study suggests that rising carbon dioxide concentrations in the atmosphere, not rising temperatures, may be the primary cause
by HENRY HENGEVELD
This past fall, our annual fall leaf clean-up began in mid-October, when the sunburst locust began to shed. Two weeks later, the chestnut tree suddenly dropped its leaves. However, at the time, the leaves on the maple and Chinese elms were still green. It wasn’t until the second half of November that these began to fall, and we could do our final yard clean-up.