Which statement describes one characteristic of index contour lines? O They appear thinner and lighter than other lines on a map.
They show regions where a difference in elevation exists.
O They show the locations of roads and paths on the landscape.
They show ratios used to determine the actual distance on a map.

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:

i am going to guess that it is co2.