Figure: Greenhouse gas emissions by secto*l05-gpnou8ijq1q5/bnj s h w 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 smogh 78q(v xdn*3xs4 e76vsr cajc.

  Particulates are produced during the co bb3bb/g( .se .ly8tsumbustion of fossil fuels and emitted into the atmosphere. PM2.5 refers to the di .b8bty(e l .bbs/3usgameter of the particulate matter.
State which unit of measurement is referred to by PM2.5.

  Figure: An urban environme;zfi4kquj6n5m t*fk ,o8k1m nlp 9 bl5nt


Deduce the name of the process explained in the Figure.

  Identify which of the following factys jyu/+(k2 rwors contribute to the frequency and severity of smj2k +y y(/urwsog.
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 atmospher/i npxwv974 xce as a gaseous fiw 49x/ pxvcn7orm.

State which element is not found in the atmosphere.

  Determine which of the following greenhouse gases is correcto54*e0d wg)rzu v3 l4.wpndih fb /o.lly paired with its sourb n) wd4huwd..e34*/izo5 0pfllvgo rce.

  Figure: Causes and eeik,5 ;en+ mjut2;btiffects 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 managemvz dchzoch8(0 (sh8k s uxng0(jb.q9/ent strategy to regulate and reduce the pollutants causing smdco . 8(hjhsbx00 hqucvzn(8g/( kz9sog and overall air pollution at the point of emission.

  List the main greenhouse gasesulf hp:en 8 ;hot,15xe.

  State what photochemi 7c52d,ub)obs- yi qvt4 5 xia(owy4akcal smog is a mixture of.

  Identify the statement(s) that are not true about primary poll vn2j;m9g *as(g4 fotbutants.
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 fu0s;nq3jjr7 u09m -fclg icj w-xh 1.formation of photochemical smjmi 1 3qw jh0cj097s;fnuc lx-u.f-rgog.

  Figure: Standards for PM1v1wq ianl-1c(ts,: lu0 air 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 , 8x-bkemlqmc9)3sojof air pollution

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