Lumber Pressure Treated With Chromated Copper Arsenate. Chromated copper arsenate (CCA) has been used extensively in this country as a wood preservative. CCA is composed of: copper, which acts as a fungicide; arsenate, a form of arsenic, which is an insecticide; and chromium, which binds the ingredients to the wood.
Devilâs Throat at Iguazu Falls in Argentina. Photo by: Luca Galuzzi, Creative Commons. Iguazu Falls, also known as Iguassu or IguaÃ§u Falls, are situated on the border of Argentina and Brazil. They touch the Parana region in Brazil and the Misione region from Argentina. The falls separate the river into upper and lower Iguassu.
The San Ysidro Border Crossing at San Diego is home to the world's busiest land border crossing. It is where U.S. Interstate 5 crosses into Mexico at Tijuana. The San Ysidro Border Crossing is one of three ports of entry in the San DiegoâTijuana metropolitan region.