Nitrogen fixation is the compound
A) km would be used to measure the length of a bicycle trail, the other options do not measure distance.
Ozone is produced naturally in the stratosphere. But "good" ozone is referred to as ozone-depleting substances (ODS), including chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), halons, methyl bromide, carbon tetrachloride, and methyl chloroform. These were are sometimes still used in coolants, foaming agents, fire extinguishers, solvents, pesticides, and aerosol propellants. Once released into the air these ozone-depleting substances degrade really slowly. They can remain intact for years as they move through the troposphere until they reach the stratosphere.
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you may get depressed or you you could just enjoy it like do fun things with freinds and family
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Grey Mice have a higher fitness because their phenotype allows them to blend in with their environment, thus helping them to avoid predators. This allows them to survive and reproduce better than the other mice.
