HB 4313 prohibits political subdivisions (such as cities, counties, and special districts) from imposing fees, charges, or assessments to fund climate or environmental projects. The bill defines a climate or environmental project as any initiative aimed at reducing greenhouse gas emissions, mitigating climate change, adapting to climate effects, reducing pollution, or increasing public awareness of environmental issues. However, it explicitly excludes basic sanitation and waste disposal services from this definition. The bill amends Chapter 140 of the Local Government Code by adding Section 140.014, which bars local governments from charging fees for services, permits, or approvals if the revenue is used to finance climate-related programs. This restriction applies broadly to any required payments for privileges, services, permits, licenses, certifications, or approvals issued by a local government.