1. Exposición (Chuvia Ácida-Acid Rain)
Diálogos:
Damián:
-Hey guys my name is Damian and this is my partner Ruben. First
of all, this is difficult to explain even if you are speaking your own
language so if you are speaking English it makes this much
harder. So pay attention and we are going to do the best we can.
Anyway, today we are going to talk about something very
interesting and, as you can see in the screen, (Diapositiva 1) we
are going to talk about acid rain. And now I am going to explain a
little about what we are going to see.
- (Diapositiva 2) Well, first we are going to see what acid rain is.
Then we are going to see the composition of sulfuric acid rain
and nitric acid rain. Next we are going to see the different
impacts that acid rain have: Acidification of ecosystems,
deterioration of lands, green house effect and corrosion of
infrastructures. Then we are going to continue with the possible
solutions to acid rain problem and finally we will take a look at
acid rain in Galicia.
- (Diapositiva 3) So let´s begin. What is acid rain? Well acid rain is
like normal rain but it is not water that is falling from the clouds,
it is a chemical compound that can be sulfuric acid or nitric acid.
Normal rain has a pH of 4,2 a little bit acid, and acid rain has a pH
of 3, which is very acid.
- (Diapositiva 4 e 5) OK. Now we are moving on to explain nitric
acid. As you can see transports release NO. Then NO reacts with
O2 to become NO2. The NO2 reacts then with the water vapor
and it becomes HNO3.

2. - (Diapositiva 6 e 7) So now we are going to explain the H2SO4
rain. Factories release SO2 and then it reacts with OH to become
HOSO2. Next HOSO2 reacts with O2 to become OH and SO3.
- (Diapositiva 8) OK, now we are going to see the impacts that
acid rain can have on the environment: acidification of
ecosystems, deterioration of lands, corrosion of infrastructures
and green house effect.
- (Diapositiva 9) Well, the acidification of ecosystems makes the
pH of water get lower and many species can´t survive in that
environment.
- (Diapositiva 10) Next we have corrosion of infrastructures. Acid
rain can destroy monuments or important buildings because acid
rain erodes the rock or even metal.
- (Diapositiva 11) Now we have deterioration of lands. The
protons of the acid rain drag on the ions of the land and that
makes the earth have less nutrients. That’s a bad thing.
- ( Diapositiva 12) For the final impact we have the green house
effect. Although this effect is minimum, acid rain makes the
atmosphere hold more solar beams and this rises the global
warming
Rubén:
- ( Diapositiva 13) Now we are going to see the possible solutions
for the acid rain problem:
Reducing pollution.
Adding alkaline compound to lakes and rivers to reduce acid.
The governments should control the factories.

3. Using natural fertilizers that do not contaminate.
- (Diapositiva 14) Reducing pollution using public transport in
order to realese less harmfull gases
- (Diapositiva 15) Adding alkaline compounds to the earth to
make water more basic than acid. That will make that the
animals can survive more easily.
- (Diapositiva 16) The governments should control factories
because of their contamination making them pay fines or even
closing their factories
-(Diapositiva 17) Using natural fertilizers to help keep the
environment clean.
- (Diapositiva 15) Now we are going to take a look to the acid rain
in Galicia. Galicia is the community with the highest rates of SO2
and NO in Spain. Galicia makes the 30% of all this type of
contamination in Spain. The factories responsible for this are the
Endesa factory in “As Pontes” and Unión Fenosa in “Meirama”.
The two companies were sanctioned by the UE and now they
have to do renovations or close their factories in 2020
- (Diapositiva 16) The authors of this work are Rubén Gómez and
Damián García. Hope that you like it and if you have any question
we will try answer them.