JUN 12, 2022 10:00 AM PDT

A 50% reduction in emissions can be achieved. Here's how

In 2021, the United States set an ambitious goal of reducing greenhouse gas (GHG) emissions by at least 50% by 2030. This policy called for reducing such emissions from several facets of the economy, to include the energy sector, transport sector, and industry sector. One year later, and with only eight years left to reach that goal, are we on track to succeed?

In a recent study published in Science, a team of scientists and policy analysts from across the nation suggests that there are multiple pathways to achieve this goal -- but big commitments will need to be made, immediately.

"This study should give policy makers and other energy stakeholders some level of comfort, by showing that everybody in the field is pointing in the same direction. The case for clean energy is stronger than ever before and our study shows that the 2030 emission target can be achieved," said Nikit Abhyankar, one of the study's authors and a scientist in the Electricity Markets & Policy Department at Lawrence Berkeley National Laboratory (Berkeley Lab). He notes that the most urgent actions will be to double the amount of renewable capacity built each year and transition predominately to electric vehicles within the next decade or so.

"With the right policies and infrastructure, we can reduce our emissions, while saving American consumers billions of dollars and generating new employment," he said.

Reducing GHG emissions by 50% by 2030 would put the United States on a path to limit global warming to 1.5 degrees Celsius, the target scientists say is required to avoid the worst consequences of the climate crisis.

The study consolidates findings from six recently published techno-economic models that simulate the U.S. energy system operations in comprehensive detail. According to the authors, the separate models all agree on four major points:

  • The majority of the country's greenhouse gas emissions come from power generation and transportation, so to reduce overall emissions by 50%, the electricity grid needs to run on 80% clean energy (up from today's 40%), and the majority of vehicles sold by 2030 need to be electric. Other important sources of GHG emissions reduction include electrification of buildings and industries.
  • The primary barrier to increased alternative energy use will not be cost, it will be enacting new policies. A coordinated policy response between states and the federal government will be necessary to succeed.
  • Thanks to advances in wind, solar, and energy storage technologies, powering the electric grid with renewables will not be more expensive; and electric vehicles could save every household up to $1,000 per year in net benefits.
  • A clean-energy transition would reduce air pollution, prevent up to 200,000 premature deaths, and avoid up to $800 billion in environmental and health costs through 2050. Many of the health benefits will occur in communities of color and frontline communities that are disproportionately exposed to vehicle, power plant, and industrial pollution.

"Our study provides the first detailed roadmap for how the United States can reach its 50% greenhouse gas emissions-reduction target by 2030," said lead author John Bistline, program manager in the Energy Systems and Climate Analysis Group at the Electric Power Research Institute. "This will require tripling the pace of historic carbon reductions, an ambitious but achievable target if stakeholders collaborate across all sectors. By comparing results across six independent models, we provide greater confidence about the policies and technology deployment needed to achieve near-term climate goals, laying the groundwork for an affordable, reliable, and equitable net-zero future."

As always, keep doing science & keep looking up!

Sources: International Institute for Sustainable Development, Science

MS in Geological Sciences
Laurence Tognetti is a six-year USAF Veteran who earned both a BSc and MSc from the School of Earth and Space Exploration at Arizona State University. Laurence is extremely passionate about outer space and science communication, and is the author of “Outer Solar System Moons: Your Personal 3D Journey”.
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