Figure: Greenhouse gas emislg/la9a h5hb/2 tsx ;+so ug0asions by sector



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 contrib :bffv txnxc3k71vj9(hy12 n lutor to photochemical smog.

  Particulates are prode 2tm;mknk;27g) v h1+m dbak oh(lz6quced during the combustion of fossil fuels and emitted into the atmosphere. PM2.5 refers to the l mokdzg)k6b; ht+ve2hn; kmq1m(a27 diameter of the particulate matter.
State which unit of measurement is referred to by PM2.5.

  Figure: An urban enveoax/sg3 ,.+r rnyx5/i*aqb oironment


Deduce the name of the process explained in the Figure.

  Identify which of thebk33ybew +,gm following factors contribute to the frequency and severity of 3 b,bek y3mgw+smog.
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 ecosystems, including in the atmosphere asi1w*2+t arzc(jewm2cuno( n4 a gaseous fc n1 mzwi tao*2ruc4 +j(2wn(eorm.

State which element is not found in the atmosphere.

  Determine which of the following greenh rvj +:3g7u2+dupyidkb9tm*g 0rojo(ouse gases is correctly paired with its source d(uj 93jr d2gp+r 0bmg7i tkov:*yuo+.

  Figure: Causes and effects of air p nfg;/hd tt6.ogfe:s3 v7nxt 8ollution

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

  Deduce which of the following would nah7kcxb2.9m i3 t7mgs ot be considered a pollution management strategy to regulate and reduce the pollutanmx7icag.973bth 2msk ts causing smog and overall air pollution at the point of emission.

  List the main greenhouse gases. hqts323rs 4n*2xm agv

  State what photochemical smog is a mixcb6hfnrq 4o72 ture of.

  Identify the statement(s) that are not true about primaryf(8 4:ec rp-hwgrh,s x 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 l5uunpth/3c 7m ead to the formation of photochemu53 thm7cun /pical smog.

  Figure: Standards for PM10 air pollmo0. udiv9o,wsqk9 l2utants
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 p./m fm04id hvq s*s2gnollution

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