Agriculture 2 Air pollution 2 Air quality 2 Aldehydes 2 Argentina 2 Argentina (fish) 2 Biomonitoring 2 Biomonitors 2 Chemical parameters 2 Chlorophyll 2 Elemental content 2 Environmental Monitoring 2 Environmental Pollutants 2 Geology 2 Heavy metals Metals, Heavy 2 Pesticides 2 Plant Leaves 2 Principal component analysis 2 Soil Pollutants 2 Spectrometry 2 Spectrophotometry, Atomic 2 Spectrophotometry, Atomic Absorption 2 Support, Non-U.S. Gov't 2 Tillandsia 2 Tillandsia capillaris 2 agriculture 2 air monitoring 2 air pollutant 2 air pollution indicator 2