Humans are also regularly harmed by pollution. Long-term exposure to air pollution, for example, can lead to chronic respiratory disease, lung cancer and other diseases. Toxic chemicals that accumulate in top predators can make some species unsafe to eat.
#include <iostream> is the Standard C++ way to include header files, the. 'iostream' is an identifier that maps to the file iostream.h. In older C++ you had to specify the filename of the header file, hence #include. <iostream.h>. Older compilers may not recognise the modern method, newer.
1 Cisco PCI Compliance Services âCisco Systems, Inc.  Cisco IOS (Internetwork Operating System) is a proprietary operating system that runs on most Cisco Systems routers and switches. The core function of Cisco IOS is to enable data communications between network nodes.