The CTBT is a multilateral treaty that bans all nuclear explosions, for both civilian and military purposes, in all environments.

The Paris Agreement is a legally binding international treaty on climate change, adopted by 196 parties at COP21 in Paris.

CENTO failed to act collectively during wars involving Pakistan.

Pakistan borders China and, at the time, was close to contested Soviet-influenced regions.

COP21 in Paris produced the landmark Paris Agreement in 2015.

The UK proposed the Global Apollo Program in 2015 to commit 0.02% of GDP to clean energy research to combat climate change.

Kyrgyzstan joined the EAEU in August 2015.

The EAEU came into force on 1 January 2015.

Solar PV has become the fastest-growing renewable technology globally.

Asia has rapidly expanded renewable energy capacity, particularly in solar and wind.