Figure: Greenhouse gas efl 0g0lxx+g bez 54sz)un+d c/missions 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 contributor to photochemical sm0x, co(hl5q lfua;tu :og.

  Particulates are produced during the co2 w h(ul2c9e(d dgkn0qmbustion of fossil fuels and emitted into the atmosphere. PM2.5 refers to the diameter o 2wng2cdql(k0e (h9 duf the particulate matter.
State which unit of measurement is referred to by PM2.5.

  Figure: An urban environment f (ivac *m2 b9nahqw39


Deduce the name of the process explained in the Figure.

  Identify which of thetgam) ;yky-b.y su.yih7 sl *vsnr9++ following factors contribute to the frequency and severity+ua sim ytsr-nyh*;9.y ys+.b) kgv7l of 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 i st) ;bif1sausf8,y,yo/ s(gz n the atmosphere as a 8(,/by si f)sf1gzysoa t;u,sgaseous form.

State which element is not found in the atmosphere.

  Determine which of the follz.mu7r swalo)lrs ,)jj0 gxzp1 1a96sowing greenhouse gases is correctly paired with its s z1l) js9, x. )rl0om1az6ujrp7swsgaource.

  Figure: Causes and effects of air p)lfv:d t 8y8kyollution

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

  Deduce which of the following would not be conse)896f mtz*/ f+ay lhes, mthuidered a pollution management strategy to regulate and reduce the pollutants causing smog and overall air pou )syf6 ema/8+lh9t,m ez*th fllution at the point of emission.

  List the main greenhouse*z uwiagzu-gp.c 9v11 gases.

  State what photochemical smog is a mixture vmiw/kbbzg)h0vvn(*xjwp :u a 32,1j of.

  Identify the statement(s) that are not true about primary pollutanfkvejzg:z84ad1 )k1pf( i ho8 n1i ek4ts.
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 fo): 2s aqs9igzhrmation of photochemical z)s 2ia 9gsqh:smog.

  Figure: Standards for PM10 am7+mpn-(u q bnir 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 pollutao d(f8jab8dv; skp+ *ion

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