How many plant species become extinct each week on earth as a whole?

Question

How many plant species become extinct each week on earth as a whole?

Answer 1

Many scientist think that as many as 100 to 150 of plant species will become extinct each week. This is due in large part to the deforestation of the tropical rain forest. Many of these species become extinct before they are ever discovered. This large scale extinction applies to the animal kingdom as well.