Neither has there been as much ecological concern as farther north near San Pedro – though this may change, as the Department of Homeland Security announced Tuesday it would waive certain environmental and land rules for 470 miles of the border from California to Texas and another 22 miles in Hidalgo County, Tex.
Rather, most local residents seem concerned about building a wall that actually stops illegal immigrants.
"We don't want a Berlin Wall or anything, just something that keeps migrants from flooding our backyards," says Garner, accelerating her bright yellow Jeep down the gravel road that runs alongside the newly-built fencing stretching east from the tiny border crossing at Naco toward New Mexico.
As Garner drives, an eclectic array of fence styles and materials flutter by in the bright sun.
One stretch of the fence is made of a kind of steel, Vietnam-era material – once used as landing mats for helicopters touching down on the jungle floor – held together vertically by steel girders. Another stretch of the fence comprises corrugated steel bars placed one on top of the other to a height of 10 feet, and capped by another three feet of metal mesh.
A third style is built of staggered, cylindrical pillars known as bollards, with just enough of a crack between them to allow small rodents or birds through – but not humans.