6.3.1—Global action required

Because emissions cross borders, effective climate action needs shared goals, reporting, finance and implementation while states retain sovereignty.

Treaties and negotiations coordinate contributions; sanctions or border measures may reduce free-riding but raise equity and sovereignty questions. Separate scientific evidence from political agreement.

A national emissions cut can reduce global forcing, but verification and finance determine whether other states trust and join the effort.

Others’ emissions and land decisions still affect the shared atmosphere; cooperation addresses spillovers.

Global cooperation does not erase national responsibility or justify ignoring unequal capacity.