1. explain the possible causes for climate change over the last 600,000 years.
2. explain the possible causes for climate changes for the more recent past (1,000’s to 100’s of years).

i think the answer to your question is: settlement of the interior and economic growth. ( ^_^)／

it deviates because of the date.

explanation:

the international date line is an imaginary zig zag line on the surface of the earth roughly following the 180 degree meridian. crossing the date line causes the date to be changed exactly by one day. crossing the line from east to west , one loses a day . and from west to east, one gains a day.