A global deal to limit the use of
hydrofluorocarbons (HFCs) in the battle to combat climate change is a “monumental step forward”, John Kerry , the US secretary of state, has said.
The agreement, announced on Saturday morning after all-night negotiations in Kigali, Rwanda, caps and reduces the use of HFCs – a key contributor to greenhouse gases – in a gradual process beginning in 2019, with action by developed countries including the US, the world’s second worst polluter.
More than 100 developing countries, including China, the world’s top carbon dioxide emitter, will start taking action in 2024, sparking concern from some
groups that the action would be
implemented too slowly to make a
difference. A small group of countries, including India, Pakistan and some Gulf states, also pushed for and secured a later start in 2028, saying their economies need more time to grow.
That is three years earlier than India, the world’s third worst polluter, had first proposed.
Worldwide use of HFCs has soared in the past decade as rapidly growing countries like China and India have widely adopted air conditioning in homes, offices and cars. But HFC gases are thousands of times more destructive to the climate than carbon dioxide, and
scientists say their growing use
threatens to undermine the Paris accord by 195 countries, an agreement last year to reduce climate emissions.