What about the environmental effects?
Concerns particularly include effects on biodiversity, e.g. preventing migration of animals and also habitat effects.
Federal plans to complete a continuous wall along the U.S.-Mexico boundary would threaten the existence of numerous plant and animal species. Stanford’s Paul Ehrlich and Rodolfo Dirzo look at the region’s unique natural ecosystems, and what they have to lose.
Some of these habitat effects particularly get emphasized by recent work on building a wall through the National Butterfly center. This particularly highlights not just a wall but also 150ft enforcement zone that is cleared of all vegetation. This is an area where the actual border is the river, but this exclusion zone and wall gets bulldozed well back due to flood plain issues.
More than 200 species make their homes at America’s most diverse sanctuary, but construction through the reserve could begin in February
Note: The most recent budget agreement may spare the National Butterfly Center for now.