Key developments
Coal pollution is cutting solar output
ScienceBlog.com reported a Nature Sustainability study led by Oxford and UCL researchers that mapped more than 140,000 solar PV installations with satellite imagery and machine learning. The study estimates aerosol pollution reduced global solar PV output by 5.8% in 2023, or 111 terawatt-hours. China lost 7.7% and the United States 3.1%; China is the only major economy with steadily declining losses since 2013, mainly due to ultra-low-emission coal retrofits.
Why it matters
Pollution is eroding the energy solar actually delivers and may cause planners to overestimate renewable supply.
Sources & driving stories
SCIENCEBLOG.COM · Ben Sullivan
ScienceBlog.com coverageAirport Tracker exposes aviation emissions concentration
Business Wire reported ODI Global and T&E's Airport Tracker 2026, based on ICCT data covering 1,300 airports. Sydney Kingsford Smith Airport emitted 8.2 million tonnes of CO2 in 2023, and Asia-Pacific accounted for 32% of global aviation CO2. The tracker says 100 airports are responsible for about two-thirds of passenger-flight emissions, while fewer than 2.3% have credible net-zero Scope 3 plans.
Why it matters
Airport-level decarbonization is lagging far behind aviation's emissions footprint, especially in Asia-Pacific.
Sources & driving stories
BUSINESS WIRE
Business Wire coverageDOE spending collapses to two percent
Heatmap reported that the Department of Energy disbursed just 2% of its total budgetary resources in fiscal 2025, versus 38% the year before, citing EFI Foundation analysis. The slowdown is tied to staffing losses, office restructuring under Energy Secretary Chris Wright, and approval bottlenecks. The article says the disruption is affecting implementation of climate funding from the Infrastructure Investment and Jobs Act and Inflation Reduction Act, with cancelled projects and rescinded support.
Why it matters
Federal climate dollars may remain stranded if DOE cannot restore execution capacity.
Sources & driving stories
HEATMAP · Benjy Sachs
Heatmap coverageWorth noting
WORTH NOTING
Wismar geothermal district heating study advances
Green Therma and Stadtwerke Wismar have taken the first feasibility step toward adding closed-loop geothermal heat to the local district network.
WORTH NOTING
xAI adds 19 gas turbines
The Colossus 2 data center now has 46 portable gas turbines, underscoring how AI infrastructure still leans on fossil generation amid permit litigation.
WORTH NOTING
Georgia PSC race tests utility policy
The May 19 primary will decide two commission seats that influence Georgia Power rates, resource planning, and renewable program scrutiny.
Still unclear
OPEN QUESTION
How much solar output loss is unmodeled?
If pollution is already cutting global PV output by 5.8%, planners may be overstating the electricity clean power will deliver.
OPEN QUESTION
Will airports move beyond Scope 3 pledges?
With fewer than 2.3% of airports showing credible net-zero plans, the next question is whether airports will adopt demand management and capacity limits instead of only offsets and fuels.