Biden changed his predecessor Trump's attitude towards energy. In addition to returning to the Paris Agreement after taking office, he also released a 50-52% carbon reduction in 2030 in April 2021 in line with his original campaign political views (based on 2005) , To achieve the long-term goal of "zero carbon emissions from power generation" by 2035 and overall carbon neutrality by 2050, and signed the "Global Methane Commitment" with 100 countries including the European Union at COP26 to reduce methane emissions by 30% by 2030. According to statistics from the Environmental Protection Agency (EPA), the most important source of carbon emissions in the

United States is transportation, which accounts popular database for nearly 30% of the total, and automobiles and locomotives are also the most commonly used transportation in daily life. Therefore, the transition from traditional fuel vehicles to Electric vehicles are an important mile to reduce carbon emissions, and Biden signed an executive order in August 2021 to try to achieve zero-carbon vehicle sales in the United States by 2030, accounting for 50% of total sales, including battery electric vehicles (BEVs) , Plug-in Hybrid Electric Vehicle (PHEV) or Fuel Cell Electric Vehicle (FCEV). In addition to general land transportation, aviation is also a key carbon reduction project. Air transportation in the United States accounts for 11% of the country's 11% transportation carbon emissions.

In September 2021, it proposed to reduce the air transportation industry's carbon emissions by 2030. 20% reduction in air volume and net zero carbon emissions by 2050, including increased production of sustainable jet fuel, new flight technologies, etc. At present, many aviation industry players have joined the "Sustainable Aviation Buyers Alliance (SABA)", and Expressed to accelerate the development and use of sustainable aviation fuel. Note: Carbon neutrality refers to the use of low-carbon energy to replace traditional energy, or afforestation to reduce carbon emissions, to achieve positive and negative offset with the greenhouse gas generated by itself, and to achieve overall zero emissions.