Indeed, research shows that the cost of climate activity far outweighs the cost of reducing carbon pollution. A recent study suggests that if the United States does not meet its climate targets in Paris, it could cost the economy up to $6 trillion in the coming decades. A lack of compliance with the NPNs currently foreseen in the agreement could reduce global GDP by more than 25% by the end of the century. Meanwhile, another study estimates that achieving – or even exceeding – the Paris targets by investing in infrastructure in clean energy and energy efficiency could have great benefits globally – about $19 trillion. After the November 2020 election, Joe Biden was elected president-elect and defeated Trump. As part of his transition plan, Biden announced that one of his first actions, on the first day of his term, would be to bring the United States back to the Paris Agreement. He also announced his intention to support the U.S. commitment to mitigate climate change, in accordance with the Paris Agreement.   “There is still a dynamic that continues to emerge, even as the United States withdraws,” said Alden Meyer, director of the Union of Scientists and a 30-year veteran of international climate negotiations. To avoid major changes in life as we know it, global action is needed.
That is why the Paris Agreement, which aims to limit global warming, rises to 1.5 degrees Celsius this century. In fact, the seemingly small difference between 1.5 and 2 degrees could have dramatic consequences on deep nations and coral reefs. Carbon dioxide, nitrous oxide and methane are gases that accumulate in the atmosphere and prevent radiation from the Earth`s surface to space, creating what is called the greenhouse effect. According to the Intergovernmental Panel on Climate Change (IPCC), the main international panel on this issue, the concentration of these thermal gases has increased significantly since pre-industrial times and has not been observed for at least 800,000 years. Carbon dioxide (the main cause of climate change) has increased by 40 per cent, nitrous oxide by 20 per cent and methane by 150 per cent since 1750, mainly due to the burning of dirty fossil fuels. The IPCC says it is “extremely likely” that these emissions have been primarily responsible for the rise in global temperatures since the 1950s.