24 Oct 2026 5 min read

Wind and solar accountability: a sourced fact sheet

Check wind wildlife estimates, blade disposal research, recycling laws and local ordinances, with direct sources and clear limits on what each record proves.

By Dalton Barron, 337.news
Fact sheet • Sources checked October 24, 2026

Wind turbines can kill birds and bats, and turbine blades present disposal challenges. Research also shows that operational changes can reduce bat deaths. Requirements for studies, mitigation and cleanup depend on the applicable laws, permits and agreements.

This fact sheet separates historical estimates, modeled outcomes and enacted requirements. It provides context for checking claims about energy projects. It does not determine the impacts or compliance of a particular project.

Bird deaths: published estimates need dates and geographic limits

Loss, Will and Marra (2013) estimated 140,000 to 328,000 annual bird collision deaths at monopole wind turbines in the contiguous United States, with a mean of 234,000. That estimate applies to the turbine fleet and evidence used in the study, rather than the current fleet.

Erickson and colleagues (2014) calculated approximately 214,000 to 368,000 annual deaths for all birds across the United States and Canada. The draft article’s 291,000 figure was the midpoint of that range, rather than the range reported in the paper’s discussion. The study used monitoring data from 116 studies and adjusted for detection and scavenging biases.

These estimates differ in methods and coverage. Neither is a measured 2026 total, and neither establishes mortality at a proposed Louisiana solar project.

Bats: a national extrapolation is an estimate

The North American Society for Bat Research’s Table 1 estimates 926,856 U.S. bat deaths associated with wind turbines in 2023. It applies regional per-megawatt fatality rates to 2023 installed capacity. It is an extrapolation, not a nationwide count of recovered carcasses. This source does not establish a 2026 total.

Friedenberg and Frick’s 2021 population model found that wind turbine fatalities could cause substantial hoary bat declines. The results depended heavily on assumed initial population size, population dynamics and future wind development. The paper does not support a single unconditional prediction that the population will decline at least 50 percent by 2050 unless fatalities fall exactly 50 percent. The authors identified population size as a critical uncertainty.

Curtailment can reduce bat deaths, with variable results

A 2024 peer-reviewed meta-analysis by Whitby and colleagues estimated an average 62 percent reduction in total bat mortality when turbine operation was curtailed below wind speeds of 5.0 meters per second. The 95 percent confidence interval for that average was 54 to 69 percent. The authors estimated a wider 33 to 79 percent prediction interval for individual facilities in a given year.

The 54 to 69 percent interval describes uncertainty around the estimated average. It is not a guaranteed reduction at every project. A project-specific mitigation requirement needs an operating protocol, monitoring and a response when results fall short.

Blade waste: a projection, rather than a disposal tally

Cooperman, Eberle and Lantz (2021) projected approximately 2.2 million tons of cumulative U.S. wind turbine blade waste by 2050 under a 20-year turbine-lifetime assumption. Their estimate represented about 1 percent of remaining landfill capacity by volume, or 0.2 percent by mass.

The study describes conventional recycling of many turbine materials and greater difficulty recycling blade composites. Its national landfill comparison does not establish that disposal capacity is adequate at every location or that all blades will be recycled. Its conclusion was that landfill constraints and disposal costs alone were unlikely to drive a change in waste handling under the policy conditions studied.

Voluntary guidance and enforceable requirements are different

The U.S. Fish and Wildlife Service’s 2012 land-based wind guidelines are voluntary. They provide a scientific process for evaluating wildlife risks during project development.

NEPA concerns federal agency actions. Whether a project requires federal review depends on its federal approvals and other circumstances, subject to applicable exclusions and procedures. It is too broad to say every energy project receives the same federal environmental review. See USFWS’s current NEPA explanation.

Voluntary guidelines also do not make other legal duties voluntary. Federal wildlife permits can carry binding conditions. For example, USFWS eagle general permit conditions address monitoring, mitigation and compliance with other laws. State and local rules and facility agreements can impose additional obligations.

Recycling legislation: enacted laws and failed bills

Texas HB 3228: The enrolled act applies to wind or solar facility agreements entered into on or after September 1, 2025. It requires agreements to assign responsibility for collecting and reusing or recycling practicably reusable or recyclable components, including turbine blades, and for authorized disposal of components that cannot practicably be reused or recycled. It also changes financial assurance provisions. This is not an unconditional ban on landfilling every blade.

Texas HB 3229: TCEQ’s guidance identifies the law’s effective date as September 1, 2025. Covered renewable energy component recycling facilities must report annually and provide financial assurance equal to 100 percent of an independent engineer’s estimated recycling or final disposal cost. These are obligations for covered recyclers, distinct from facility lease requirements.

Arkansas SB 452: The legislature’s bill history says it died in Senate committee at adjournment on May 5, 2025. Its proposed January 1, 2026 contract requirements should not be described as enacted law.

Wyoming HB 89: LegiScan’s reproduced legislative history records that the 2025 bill died in committee on March 3, 2025. Its proposed on-site disposal and landfill restrictions should not be presented as a law that took effect July 1, 2025.

Eaton County wind rules: an adopted 2023 example

Eaton County’s August 16, 2023 ordinance archive, Section 14.41, documents utility-scale wind requirements. These are historical local provisions, not a nationwide standard or a determination of current requirements for a specific project.

Setbacks include twice tower height from non-participating property lines and a separate 1,500-foot provision covering non-participating parcels and specified occupied buildings. The text contains an exception for structures built after approval.
An engineer-prepared decommissioning plan addresses removal to four feet and restoration of agricultural soil classification, with specified exceptions for access improvements.
A financial guarantee must be posted before construction and remain irrevocable and non-cancelable while the system exists. The plan identifies funds deposited with the county treasurer.
Twelve continuous months without operation constitutes abandonment.
The sound limit is 45 dB(A), measured as a ten-minute equivalent level at non-participating parcel boundaries. Shadow flicker at occupied buildings is limited to 30 hours annually.

How to check a project-specific claim

Identify the project and technology, then obtain the applicable permits, final ordinance, agreements, wildlife studies and financial assurance documents. Check the required distances, monitoring duties, cleanup triggers, deadlines, exceptions and enforcement authority.

National wind mortality estimates cannot establish the effects of a particular solar development. A proposed bill cannot establish an enacted requirement. A draft ordinance cannot, by itself, establish the final terms adopted.

Source documents

Sources accessed October 24, 2026. Links point to the underlying studies, agency guidance, legislative records and local documents. The Wyoming status link is a legislative tracking service.

Updates and corrections: This fact sheet was checked October 24, 2026. Material changes will be recorded here.