Today, a total of 136 jurisdictions representing 32 countries and six continents have joined the coalition, representing more than 832 million people and $22 trillion in GDP, which is almost a third of the global economy.
China will guarantee that emissions peak no later than 2030 under the Paris pact. "The Paris Agreement is also a testament to collaboration and perseverance of nations who debated and negotiated to ultimately reach a consensus, and of NGOs and multilateral organisations who contributed to and encouraged the parties (countries) to the Agreement", said Ajay Mathur, director general of The Energy and Resources Institute (TERI), a Delhi-based think tank on energy and environment.
The Paris Agreement was reached in December previous year by almost 200.
The Eiffel Tower and the Arc de Triomphe in Paris have temporarily been lit in green as a reminder to the world to enact the Paris Agreement on climate change. So far, it has reportedly been ratified by more than 90 nations, including the biggest emitters of greenhouse gases. The science shows that we need to move much faster.
The agreement is taking effect because the European Union, Canada and Nepal ratified it last month, pushing it across the final threshold. The United States's pledge is to cut 26 percent to 28 percent of emissions by 2025.
Scientists around the world agree that limiting global warming to 2°C this century (compared to pre-industrial levels) would reduce the probability of severe storms, longer droughts, rising sea levels and other devastating climate-related events. Lisa Jacobson, president of the BCSE, said the agreement marks a new era of climate action and signals a wholesale transformation of the energy sector.
"For veterans of United Nations climate talks, who for years saw little or no progress on tackling climate change, the way in which Paris has supercharged action is just astonishing", said Richard Black of the Energy and Climate Intelligence Unit, an advocacy group in London.
But those cuts are not binding under worldwide law, which means the Senate does not have to vote on the accord.
Yet, with or without the U.S., the agreement "will not deliver the safe world we need" without being drastically strengthened, he said. But Donald Trump has pledged to withdraw the us from the accord should he be elected to the White House next Tuesday.
Earlier this year, Paris was named as the Global Earth Hour Capital for 2016 by the World Wildlife Fund (WWF), which recognised the city as a role model for climate action and praised vision regarding sustainability practices.
Its ratification came only days before the start of this year's UN Climate Change Conference in Marrakech.
The impacts of climate change are already being felt in California and will disproportionately impact the state's most vulnerable populations.
"The entry into force of the Paris Agreement means that the world now has a legal mandate to build a zero carbon future", Philippe Joubert, chairman of the Europe-based Prince of Wales's Corporate Leaders Group, said in a statement.