英语语法1.pollution is the price we pay for an overpopulated,ove

英语语法
1.pollution is the price we pay for an overpopulated,over-industrialized planet.这里还原定语从句是不是...we pay the price for an overpopulated,over-industrialized planet?
2.but people who are cut offf not only from foreigen tourists,but even from their own countrymen can be hostile to traveller.这里的两个but分别是什么词性?people can be hostile to traveller是主谓宾还是住系表?