Annual global greenhouse emissions rose by a record 6.4% last year, eclipsing gains made during 2020 lockdowns, reports the International Monetary Fund. Greenhouse gases like carbon dioxide decreased by 4.6% in 2020 as pandemic restrictions limited travel and economic activity.
Industry, as opposed to individuals, was the most significant contributor to emissions in 2021. The manufacturing and energy sectors had the greatest increase in greenhouse gases, while transportation and household levels rose more modestly as COVID-19 restrictions continued.
The Intergovernmental Panel on Climate Change’s latest report warns that greenhouse gas emissions must peak by 2025 at the latest — and decrease 43% by 2030 — in order to limit global warming to 1.5 Celsius. Limiting global warming “will require major transitions in the energy sector. This will involve a substantial reduction in fossil fuel use, widespread electrification, improved energy efficiency, and use of alternative fuels (such as hydrogen),” said the IPCC.