ואתו לא תכרת
אילן העושה פירות"
to cut down fruit trees
cutting down fruit trees?
It is Chazal who said* that it is a סכנה* to cut off the fruit tree.
*As far as I know, this is the only Mitzvah in the Torah where Chazal teach us that it is dangerous to be עובר the עבירה
** Most Poskim, including the ט"ז allow cutting off the tree when the benefit outweighs the value of the tree. They are not concerned in such cases for סכנה.
R.Y. Hachasid writes even in such cases one should not cut off the tree because of סכנה.

