US government opens 22M acres of federal lands to solar

Original Article ↗ Hacker News Discussion ↗

The U.S. government’s move to open 22 million acres of federal land—an area roughly the size of Maine—for potential utility-scale solar projects is prompting debate over how and where large solar should be built. Commenters weigh the climate benefits and sheer generation potential against concerns about desert ecosystem damage, transmission build-out, legal challenges, and whether rooftops, parking lots, farmland (via agrivoltaics), or highway corridors would be better locations. Many see the plan as an important step toward decarbonization but argue that policy, economics, and land-use tradeoffs will determine how much of this theoretical capacity is actually realized.

Permitting, Law, and Transmission

  • Debate over whether these lands are “pre-cleared” for construction; commenters note the administration can streamline but not fully preempt environmental laws or lawsuits without Congress.
  • Some want pre-studied, pre-approved transmission corridors to avoid decade-long legal battles; others stress the importance of preserving the ability to challenge harmful routes (e.g., forest fragmentation cases).
  • Concern that utilities exploit NIMBY rhetoric to weaken environmental review rather than seek a balanced process.

Siting, Deserts, and Local Climate

  • Many see siting in the Southwest deserts as logical, but others stress US deserts are biologically rich (biotic soil crusts, plants, animals) and not empty sand.
  • Practical questions: dust, sand abrasion, hail, lightning, water for cleaning, and realistic panel lifetimes (some skeptical of 30-year assumptions).
  • Discussion of large-scale albedo changes: desert-covering arrays could significantly alter local and even global climate; some frame this as geoengineering, not pure “mitigation.”

Scale, Land Use, and Alternatives

  • 22M acres greatly exceeds land strictly needed for US solar, but commenters note this is a potential area to give siting flexibility, not a build-out target.
  • Comparisons: area roughly Maine/Portugal; enough to power all US homes or a big fraction of global electricity if heavily built out.
  • Strong criticism of biofuels: corn-for-ethanol uses tens of millions of acres, with solar offering ~200x more energy per acre. Some expect that land to shift as EVs displace ethanol demand.
  • Concern about turning fertile land into solar fields; claims (disputed) that damaged farms with hail-broken panels have heavy-metal contamination limiting future use.

Agriculture and Agrivoltaics

  • Proposals to incentivize farmers to shift from water-intensive crops to partial solar, potentially lowering water use and diversifying income.
  • Agrivoltaics (crops + elevated or vertical panels) highlighted as a way to keep production while generating power and reducing evaporation.
  • Others argue intact desert ecosystems should be spared and disturbed lands or rooftops prioritized.

Rooftops, Parking Lots, and Highways

  • Many advocate maximizing rooftop and parking-lot solar first: uses already-built surfaces, near loads, and adds shade/cooling.
  • Counterpoints: higher labor and structural costs, fire incidents on some big-box roofs, and local procurement/bureaucratic hurdles make these less attractive than cheap open land for utility-scale.
  • A few promote highway-PV concepts; others dismiss them as structurally costly and vulnerable to wind.

Solar vs Nuclear, EROEI, and Storage

  • One thread claims solar’s energy return (EROEI) is too low and nuclear’s is far superior; others cite studies showing modern PV EROEI in the ~9–34 range, likely adequate if above 1.
  • Intermittency: skeptics say solar alone “could never” power the US without enormous storage; others point to rapidly scaling battery manufacturing but concede current deployment is far short.
  • Debate over nuclear economics: some argue nuclear is inherently uneconomic in current markets; others blame regulatory and fossil-fuel lobbying for inflating costs.

Ecosystems, Trade-offs, and Overall Impact

  • Environmental critiques: habitat loss, desert biocrust damage, forest fragmentation, and uncertainty about long-term decommissioning.
  • Supporters argue the ecological damage from climate change and from existing fossil extraction (millions of acres leased for oil/gas) is far worse than careful solar build-out.
  • Several note that federal planning documents and impact statements exist, with opportunities for public comment, but impacts on “irreplaceable natural heritage” remain a core concern for some.