Global warming warning! Be on the alert for the attack of the invasive weeds!
This is the latest in a long series of the possible consequences of supposed global warming. The dire scenario is set forth in a San Francisco Chronicle story by Joe Eaton and Ron Sullivan:
For educational purposes, the California Invasive Plants Council will sell you bouquets of plastic weeds, including yellow star thistle, tamarisk, leafy spurge and knapweed. Some recent studies suggest that many gardeners need not invest in these because they can expect more of the real thing to arrive as climate change advances.
Oh goody! I no longer need to shell out big bucks for those all-important plastic weeds. All I need do is wait for global warming to produce them naturally.
A warmer world will have more atmospheric carbon dioxide and nitrous oxide. UC Irvine's Diane Pataki says nitrous oxide has 300 times the global warming potential of carbon dioxide per molecule. It's released when soil bacteria covert ammonium to nitrite.