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DUTCH ELM DISEASE
Siberian elm was widely planted in America for windbreaks and as a disease-tolerant shade tree; it escaped cultivation and is now considered invasive in 41 statesSiberian elm, initially introduced to American landscapes for its Dutch elm disease resistance, soon proved problematic as it became invasi...- MacKenzie Scott's leap into philanthropy began 3 yrs ago & has already exceeded $12 bn in grants. This is how she did itA privileged child, she left a Connecticut boarding school after her family declared bankruptcy.
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