generating power from the power plants is important, but it is principle source of air pollution, so it is appropriate to study the ratio of pollution elements through the analysis of plant leaves in the surrounding areas
Initially you need to identify and select a number of potential contaminants (e.g. lead, cadmium etc) emitted from the power plant activity.
A better assessment of the extent of any chemical/contaminant deposition from the power plant (presumably coal or gas boilers) is to monitor the top soil in the surrounding area. The determination of the surrounding area may be based on a simple air dispersion model or some sensible radial distance from the plant. Plant analyses can be part of the study since plants can absorb any deposited chemicals from leaves and roots.
The above chemical levels have to be then compared with that of the 'control' sites (sites without the impacts of power plant emissions) soils and plants.
for the estimate of polluting of elements in plant leaves through Biochemical analysis as well as morphological analysis ...before that you need to analyze the elemental toxicity ration analysis through Aqua regia extraction analysis protocols..
1.firstly you have to culture two separate plants which one you want to culture in that one plant culture is keep in room inside or any laboratory (Control) and second one is keep for outside of the polluted area but both are under the solar light.
2. wait for hourly test or day test or any one select depends on your convenient.