rain is a new phenomenon occurring since the past few decades.
Rain reacts with the oxides of sulphur and nitrogen to form
acids. Undoubtedly, this oxides come from the industrial as
well as automobile emissions. Acid rain is thus created by
industrial activities that pollute the air.
main sources are electric power plants that use the energy
produced by burning coal to generate electricity. Most coal
contain small amounts of sulphur, which is converted to
sulphur dioxide when the coal is burned. This is a global
problem which after devastating a large part of the northern
hemisphere is now intruding into the industrial regions of the
South. This versatile destroyer eats away the forests,
acidifies fresh water sources, afflicts human beings, and,
causes irreversible damage to monuments and buildings which
stand as testimony of time and symbols of our culture and
civilization of the yester years.
rainwater turns acidic due to the gases emitted by industries
and automobile exhausts. These gases react under the influence
of oxidants, catalysts and suns radiation before dissolving
into water droplets and ice crystals to form dilute acid
solutions. These acid solutions fall to the earth as rain,
snow, hail, dew and fog. A peculiarity of acid rain is that
while the causative agents are emitted at one place, the acid
rain falls at another.