Figure: Greenhouse gamvij)k:g.fl2(c lbb h)h9 tf0s 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 thaf60nkcj9ml)(xf4za q t is a major contributor to photochemical smog.

  Particulates are produced during 8 sa4cjpce1xevge7l661sy) j the combustion of fossil fuels and emitted into the atmosphere. PM2.5 refers t 4 jlvgse8cc176e a 6)spx1yejo the diameter of the particulate matter.
State which unit of measurement is referred to by PM2.5.

  Figure: An urban environ.4euk. 6waaj*brvn w7ment


Deduce the name of the process explained in the Figure.

  Identify which of the following factors cszkk m5,)im;hr o.1sv ontribute to the frequency and severity h)zk;,1 smois kv5r.mof 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 atmosni8 xp 0juqqg,ji8f,gjzo3. 2phere as a gaseous foip,xz i8j2o83 jg,j fq.ug0nq rm.

State which element is not found in the atmosphere.

  Determine which of the bcc.3f24:rg*g4lcn ,wog h h tfollowing greenhouse gases is correctly paired with its sougw4hoc2.lgcgh3 4, fbrt nc :*rce.

  Figure: Causes and effectsgstcqvn,m ff) (::z 9l 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 considerex/byty 8+: (yxx micy4d a pollution management strategy to regulate and reduce the pollutants causing smog and overall air pollution at the poy48x+m: xci ytx/(byy int of emission.

  List the main greenhouse gas40 ;d 1x(hrqmsnj :dktes.

  State what photochemical sm zy,)bbf0x 6imog is a mixture of.

  Identify the statement(s) that are not trgqhr9s *8 tdi.2 o6wo42ipmek ue 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 wly 7;f g/lx*d-e:qypaould most likely lead to the formation of photochemfg7y-:qye pd/x ll;a*ical smog.

  Figure: Standards for PM10 air polluta4lq7sl5f-qb1tx f2 cjk c8z -ants
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 ( eko2003jgx qah9atjm 9o sf7of air pollution

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