Figure: Greenhouse gas emissions by sectonvq5+0 on 1gk1:ltn5qmfmce1 r



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 se0i0us:z, ivg z6v 2e5pdlj 5cmog.

  Particulates are produced gauxgp9+ku k -:bg;b5during the combustion of fossil fuels and emitted into the atmosphere. PM2.5 refers to the diameter g9- 5uk+kgbubp;ax g: of the particulate matter.
State which unit of measurement is referred to by PM2.5.

  Figure: An urban environmen4x yqow7xt8 twz**9kw t


Deduce the name of the process explained in the Figure.

  Identify which of the following factors contribute to the frequen2m6z vjmn:p j,- utd2tcy and severity of smz, 22-j dmt6vuntp jm:og.
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 thmzw3u:my a68je atmosphere as a gaseous form.6w 8ayj3mzm:u

State which element is not found in the atmosphere.

  Determine which of the following greenhouse gases is z j1x2o qon/3acorrectly paired with its sou /noaz 1jq3x2orce.

  Figure: Causes and effects of at.p;g1(-skes,grv n vir pollution

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

  Deduce which of the following would not be considered a pol+)mfnn3,pay/c7zmrepn fvl.. rm yx1/+4 d mv lution management strategy to regulate and reduce the pollutants cm.nd yz cl+v1f,)e+mrrnmpx7y3m4 .n a fv/ p/ausing smog and overall air pollution at the point of emission.

  List the main greenhouse gases5re 7ch pry)2s.

  State what photochemical smog is a mixture o vpm 8xffhf :uo9*q/;ok8lr6j3qpw 3xf.

  Identify the stateme4 ro;u1vod 6 lmhm)gi3nt(s) 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 leam8vo eep r5.*5-ipagrhyt, i0d to the formation of photochemicapm*eg5,ot.ya -iv8ire5pr0hl smog.

  Figure: Standards for PM10 air polluta/m c1wfuu5k8ewdia*4 b1nj on2e gch0/6p b s.nts
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 ka z1,8m qj;rvhwm+w5pollution

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