እነዚህ ደረጃ በደረጃ አቅጣጫዎች የአሜሪካ / ሜክሲኮ ድንበር በሳን ዢድሮ ውስጥ እንዴት እንደሚሻገሩ ያሳይዎታል.
This presentation will consider the environmental problems we are facing along the United States/Mexico border in the Southern California area.