A．It tries to predict the possible trends of global climate change.
B．It studies the impacts of global climate change on people’s lives.
C．It links the science of climate change to economic and policy issues.
D．It focuses on the efforts countries can make to deal with global warming.
A．It will take a long time before a consensus is reached on its impact.
B．It would be more costly to deal with its consequences than to avoid it.
C．It is the most pressing issue confronting all countries.
D．It is bound to cause endless disputes among nations.
A．The transition to low-carbon energy systems.
B．The cooperation among world major powers.
C．The signing of a global agreement.
D．The raising of people’s awareness.