VOLCANOES
Volcanoes
can sometimes be helpful.
Ash from volcanoes
makes
soil
good
for plants
.
Rocks from volcanoes
are used
to build houses
.
Crashed volcanic rock
is used
in soaps, cleansers, concrete, and plaster
.
Heat from volcanoes
helps warm swimming pools and houses in Iceland. Heat from volcanoes is also used
to make electricity
.