What human activity is most responsible for the damage to the ozone layer? a) the use of freon and cfc spray propellants. b) deforestation and interruption of the water cycle. c) the contamination of groundwater with mercury and pcbs. eliminate d) burning of fossil fuels and the subsequent creation of acid rain.
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Which cell organelle is the site for photosynthesis? a. chloroplast b. endoplasmic reticulum c. golgi apparatus d. lysosome
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