ACID RAIN: CAUSES - XTECateneu.xtec.cat/.../_media/cmd/lle/clsi/modul_3/acid_rain_causes.pdf · Volcanoes, as well as factories and cars, emit the gases that produce the acid rain.

ACID RAIN: CAUSES

A paradise island: which one is it?

Limestone and marble

dissolve in acid rain.

Welcome to

HAWAII.

This forest in Hawaii has been

damaged by acid rain.

But in Hawaii there are not many

factories, not even many cars.

What causes the

acid rain in

HAWAII then?

The most active

volcanoes on

Earth are in

Hawaii.

Volcanoes, as well

as factories and

cars, emit the

gases that produce

the acid rain.

Which are the gases

that produce acid rain?

Sulphur

dioxide

SO2

Which are the gases

that produce acid rain?

Nitrogen

dioxide

NO2

Reactions that lead to

acid rain

SO2 + air SO3

SO3 + H2O H2SO4

4 NO2 + 2 H2O + O2 4 HNO3

Sulphuric acid and nitric

acid, mixed with water,

make acid rain.