When was the date when the Climate Change In the arctic happened ?

2007

“Sea ice extent was clearly on its way down, and Arctic temperatures were clearly rising.” “But then came 2007, when September sea ice extent didn't just drop to a new record low, it blew away the old record. In many ways, 2007 was the beginning of the 'new Arctic.

answer; i believe that the correct answer is (tobacco);

the perimeter of a triangle is 69 cm. side a is 5 cm shorter than side b. side c is twice as long as side a. find the length of each side. i need to know how to do it in 2 equations.  

equations:

a = b-5

c = 2a

a + b + c = 69