Paris climate deal: countries with about half of global emissions to join this year

At least 34 countries representing 49% of greenhouse gas emissions formally joined the agreement, bringing it 'within striking distance' of entering into force

The White House has said countries accounting for about half of the world's greenhouse gas emissions would join the Paris climate agreement this year, bringing the agreement "within striking distance" of entering into force.

At least 34 countries representing 49% of greenhouse gas emissions formally joined the agreement, or committed to joining the agreement as early as possible this year at a high-profile signing ceremony at the United Nations last Friday.