What does it mean to have a high ph (which numbers), low ph? which is acidic? which is basic? which has more h ions? which has less h ions?

of those who start drinking before they're 15 will develop alcohol dependence

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: