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As federal support for carbon dioxide removal (CDR) faces rollbacks, U.S. states are positioned to advance direct air capture (DAC) by aligning specific technology types with local assets. The report identifies a diverse range of DAC technologies—from fully electric systems to those requiring high-temperature heat—and maps them to state-level opportunities. For example, California's geothermal resources and Texas's renewable curtailment and CO2 infrastructure offer distinct advantages. While some states like Washington and Texas are suited for large-scale sequestration, others like Massachusetts can serve as innovation hubs for waste-heat recovery and CO2 utilization. The document emphasizes that maximizing climate benefit requires pairing DAC with low-carbon energy to avoid eroding net removals.

Romania's hard coal mines in the Jiu Valley are significantly exceeding the EU's upcoming methane intensity limits, with 2022 levels at 14.9 tonnes per kilotonne of coal compared to a 2027 limit of 5 tonnes. To avoid penalties, the document suggests Romania improve its degassing efficiency from 25% to at least 50% and implement Abandoned Mine Methane (AMM) projects, similar to those used in Germany, Poland, France, and Russia.

Romania's coal mines, particularly in the Valea Jiului region, face potential sanctions under the EU Methane Regulation due to emission levels significantly exceeding the 5 tonnes per kiloton limit set for 2027. In 2022, emissions in Valea Jiului averaged 14.9 tonnes per kiloton. To avoid non-compliance, the document suggests improving degasification efficiency—which is currently 25% compared to up to 60% in countries like Poland and Germany—and implementing 'mined methane from abandoned mines' (MMA) projects, as Romania has 173 closed underground mines that remain untapped.

The briefing examines the role of deep sea mining in providing minerals like cobalt, nickel, copper, and manganese for clean energy technologies. It concludes that deep sea mining is unlikely to solve immediate supply crunches because the necessary technology for commercial extraction and processing is not yet available, and the steepest growth in mineral demand is expected before 2035. The document highlights significant environmental risks, regulatory uncertainty surrounding the International Seabed Authority (ISA), and the potential for alternatives such as sustainable land mining, recycling, and material substitution to meet demand.

The document assesses the viability of low-carbon fuels for New York's building sector, concluding that they are inefficient and costly compared to direct electrification. It highlights that green hydrogen requires significantly more clean electricity than heat pumps and poses infrastructure risks like pipeline embrittlement. Additionally, it notes that biomethane supplies are insufficient to meet demand and that both biomethane and synthetic methane introduce new methane emission risks. The brief advocates for prioritizing energy efficiency and electrification to meet the goals of the Climate Leadership and Community Protection Act.

The document argues that renewable energy (RE), particularly in hybrid systems combining solar or wind with diesel or grid power, is increasingly viable for the mining sector. While RE requires higher initial capital expenditure (capex) compared to diesel, it offers lower operating expenditure (opex) and protects mines from fuel price volatility over a 20-year period. Key challenges include the intermittent nature of RE, which necessitates energy storage or hybrid configurations to meet the constant 24-hour baseload demand of mines, and a shortage of skilled technicians for installation at remote sites. The brief highlights a trend toward self-generation in South Africa and the potential for portable RE systems to support exploration. It recommends promoting RE for extraction efficiency, developing mobile solar systems, expanding specialized technical education, and utilizing post-mining land for community or utility RE projects.

The mining industry is a major global energy consumer, with 2014 consumption reaching almost 1,400 TWh, representing between 1.25% and 11% of total world energy use. Much of this energy is provided by carbon-intensive diesel generation, particularly at remote off-grid sites. However, falling costs for solar PV and wind energy—with global LCOE dropping by 85% and 66% respectively since 2009—now make renewables cost-competitive with diesel and grid power. The document suggests that most mining functions, excluding trucking, can be electrified, and that U.S. mines could convert an additional 30% of their energy load to electricity. Beyond carbon reduction, transitioning to renewables can provide mining companies with a 'social license to operate' by creating local jobs, improving community relations through microgrids or community solar, and helping national governments meet Paris Agreement NDCs. The 'Sunshine for Mines' program aims to catalyze the installation of 8 GW of renewable capacity in the mining sector by 2025.