Which factor is difficult to assess in a cost–benefit analysis? a. product being used by everyone b. the aesthetic value of nature c. identifying internal costs d. categorizing internal and external costs

Aplant has an egg with 34 chromosomes how many chromosomes does a leaf cell of that plant have

Match the pollutants. 1. a chlorofluorocarbon smoke 2. a biodegradable organophosphate insecticide freon 3. particle pollution paint 4. hazardous waste monoxide 5. carbon is completely burned malathion 6. carbon is incompletely burned dioxide

Which greenhouse gas is emitted when burn fossil fuels for energy? a.nitrogen b.oxygen c.carbon dioxide d.helium