Figure: Greenhouse g3g ky nk9(/fqaas emissions 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 maju+ ) )dpt*jomgxr gk7 3ry0k8jor contributor to photochemical smog.

  Particulates are produced during the crvpfsw1qw6hh d (5d *7dk t2k2ombustion of fossil fuels and emitted into the atmosphere. PM2.5 refers to twdd*fh1kr7t 6s522q(dwkhp vhe diameter of the particulate matter.
State which unit of measurement is referred to by PM2.5.

  Figure: An urban env hwt*bpt d l-u b;4q3e(d79u tfqp0l5tironment


Deduce the name of the process explained in the Figure.

  Identify which of the following factors contribute to the frequency and sep3 lsd,2nk(6cfa;-ywm yoz 3bverity of smo ;2 f-(3ck adb,sl n3ypzywm6og.
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, inclu/ u;. ,(p9fo dhyj l)8jjktmyfding in the atmosphere as a gajyth.jd fkjl8 p9muy(; ,o/f) seous form.

State which element is not found in the atmosphere.

  Determine which of the follois:q w.uqym x0/ yx.k207bdvlwing greenhouse gases is correctly paired with its sourb0ymu7i..v:s xy/qwdk20l qx ce.

  Figure: Causes and effec .zwv1rj fk9db9:v;6o a bd2cvts of air 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 pollution managem/,wq)b m; ,yqb s/snozent strategy to regulate and reduce the pollutants causing smog and overall air pollution at sq/),q bo/y n;wb ,smzthe point of emission.

  List the main greenhouse gase0g1 tgfp: b9txs.

  State what photochemicp nc*9al*mo*gf* 5aq;2uolp sw x0v6sal smog is a mixture of.

  Identify the statement(s) that are not ,sb2en+l1zcgof8fm- (zn s3wtrue 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 combinationayir48 /*a,u) /o2rxz jbypf x of factors that would most likely lead to the formation of phoxybpu8) rzaj/a/i2yr o4x *,ftochemical smog.

  Figure: Standards for PM10 aw+vdd olputk)m17dapx0) u;9ir 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 aiz(j -pmu4jb)rr pollution

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