Measuring in light-years also allows astronomers to determine how far back in time they are viewing , Because light takes time to travel to our eyes. Everything we view during the dark in night has already been happened.
1)which is not a major factor resulting in pollution from increased economic activity in china?
D) more bycicles are being used for traveling purposes.
2) Economic trends in chinas Gross Domestic Product over a 50-Year period can be best described as (1point)
B)relatively stable with low levels of economic activity from the 1950's to the late 1990s.
The Rocky Mountains are described as younger because the Rocky's are really two mountain chains. The older mountain chain started billions of years ago, and the younger mountain chain pushed the older mountain chain up more, only 60 millions years ago.
