What do machines do? O change the amount of forme you exert or the distance over which you exert the force
eliminate friction
O increase the amount of work that is done
decrease the amount of work that is done
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What do machines do

false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation:

preservation because he preserves part of the land and preserves means save

explanation:

hey, what do you need . just post the question and i may be able to you : )