What can happen when chlorine is left in drinking water

Which of the following true? a_volcanoes and earthquakes often near the plate boundaries. b_volcanoes occur whereve there are tall mountains. c_earthquakes cause volcanoes in the same location to erupt violently d_volcanoes and earthquakes occur only where plates are colliding with each other

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?

In which reaction is precipitation occurring?