Question
1
How
much
of
US
solid
waste
goes
into
landfills?
(@)
About
50%
More
than
80%
Around
13%
Less
than
3%
Question
2
Soil
salinization
refers
to
a
buildup
of
salts
in
soils.
Which
process
(@)
Over-irregation
acidic
rain
soil
erosion
excess
fertilizers
Question
3
a
major
reason
of
soil
salinization?
0.25
/025
points
0.25
/025
points
0.25/0.25
points
The
"Superfund”
program
was
created
in
1980
to
clean
up
kand
in
the
United
States
that
has
been
contaminated
by
hazardous
waste.
How
many
Superfund
sites are
there
currently
in
the
USA?
27
a
few
hundred
more
than
10,000
(s
more
than
1000
Question
4
0.25
/
0.25
points
The
International
Convention
for
the
Control
and
Management
of
Ships'
Ballast
Water
and
Sediments
entered
into
force
in
2017.
It
is
3ims
to...
reduce
atmospheric
pollution
by
ships
reduce
oil
pollution
by
ships
(s
reduce
the
spread
of
alien
species
Question
5
Msjor
types
of
soil
degradation
arc.
()
Erosion
/(|
Desertification
7
Salinization
()
Acidification
7|
Accumulation
of
toxic
chemicals
(|
Freezing
Question
6
Why
does
soil
acidification
harm
plants?
/(]
soil
becomes
less
permeable
(|
Plant
roots
are
made
of
CaCO3
(calcium
carbonate)
which
dissolved
at
low
pH
1/1point
1/1
point
