(Q1)
Forests throughout the world are shrinking because lots of things need wood to be made and or work. To get wood for needed or necessary things, people have to cut the trees down.
(Q2)
I think that we could have a few days out of the year where almost everyone/everyone who wants to attend can go around and plant some trees. This would help because the seeds would grow and create more trees so we could have a never ending cycle of growing trees.
Hope this helped!
I'm NOT 100% sure about this answer but I think it's the Lines of Longitude
Mining
The Pacific islands have a great amount of minerals
The answer is representative democracy.