The reason why it is difficult to get rid of the threat of global warming is that______.A．

The reason why it is difficult to get rid of the threat of global warming is that______.

A．not all the countries are willing to make deep cuts in emissions

B．many people welcome the global-warming effect of a warmer summer

C．the leaders of many countries are not fully aware of the gravity of the problem

D．the world technology is not able to solve the problem

此题为多项选择题。请帮忙给出正确答案和分析，谢谢！