  We examine the extent to which galactic and extragalactic foregrounds can
hamper the detection of primordial Cosmic Microwave Background (CMB)
anisotropies. We limit our discussion to intermediate angular scales,
$10^{\prime}\lsim \theta \lsim 2^{\circ}$, since many current as well as future
experiments have been designed to map CMB anisotropies at these angular scales.
In fact, scales of $\gsim 10^{\prime}$ are of crucial importance to test both
the conditions in the early Universe and current theories of the gravitational
collapse.
