Figure: Greenhouse gas emissions by so*;hso t3ev 7uector



Scientists analyzed the main contributors to greenhouse gas emissions from human-related activities. The resulting data is presented in the Figure.

Identify the contributor that is most responsible for the production and release of methane and nitrogen oxides into the atmosphere.

  Identify the chemical that is a major contributor to photochemical smorvtsp21pn k1 )vg8)as g.

  Particulates are produced during the combu 5(ci iqp4l.v5m 9.3 h-btviz bzia2vvstion of fossil fuels and emitted into the atmosphere. PM2.5 refers to the diameter of the particulate matt.v-vctz(5ihia.v 9v53b qlzi i2 p mb4er.
State which unit of measurement is referred to by PM2.5.

  Figure: An urban enviro )rf/njv6y+c onment


Deduce the name of the process explained in the Figure.

  Identify which of the following factors contribute to the frequency and sevuw3fr 4 zuq5o6(s.yaz erity of s3zq.5 a sw4z o(ruyfu6mog.
I.
Local topography (the shape of the land)
II.
Climate
III.
Population density
IV.
The amount of fossil fuels used

  Nutrients are constantly cycled in ecos(6d5p tv*bq u v0x7aytystems, including in the atmosphere as a gaseous a* 06xptb v(uvtd57yqform.

State which element is not found in the atmosphere.

  Determine which of the following greenhouse gasesg ihv5q w(:po* is correctly paired with its souri:g v(*o qwph5ce.

  Figure: Causes and effects of air pollution 9 2rzxrthmti6ey1 *vgm5o;y f)/b(jg

State, according to the Figure, which of the following is the largest contributor to air pollution:

  Deduce which of the followingyzjzi3x4bwd 944x+prj 4c *yv would not be considered a pollution management strategy to regulate and reduce the pollutants causing smog and ov 9+*ywx44yc rvpij z4jxz3d 4berall air pollution at the point of emission.

  List the main greenh ;+b: l9p8imy5an- gadqdfen6ouse gases.

  State what photochemical smog is a mixture of fh;5u o2(wi9jz mw6oe.

  Identify the statement(sf s:7+w-)frg2s2 ze hjtivzc5) that are not true about primary pollutants.
I.
Released directly from a source into the environment
II.
Usually more toxic than secondary pollutants
III.
Formed when pollutants combine under certain environmental conditions

  Predict the combination of factors that would most likely lead to the fiyy0c(7tsm7 hormation of photochec7s7hm yt0iy(mical smog.

  Figure: Standards fojt3x+ a/2 hcthd9c;vi.xdy 1ir PM10 air pollutants
WHO /$\mu$gm EU /$\mu$gm USA $\mu$gm
-3 -3 -3
24hours 24hours 24hours
−1 −1 −1
45 50 50

Calculate the percentage difference between the WHO guideline standards and the USA standards.

  Figure: Causes and effects of air pollut9 /cm.c3n6cm6j6 tmfxtuh*vj +bb9fw ion

Identify the two chemicals shown in the Figure that are also significant causes of the greenhouse effect and climate change.