It is estimated that at least 4000 non-native species have been introduced to North America.

Name: It is estimated that at least 4000 non-native species have been introduced to North America.
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Many non-native species have been introduced to North America through various means such as trade, travel, and agriculture, with estimates of the number of introduced species exceeding 4000. These include plants, animals, and microorganisms.

It Is Estimated That at Least 4000 Non-Native Species Have