Fossil fuels, such as coal, oil, and natural gas, are non-renewable energy sources because they are formed from the remains of ancient plants and animals over millions of years.

All of the options mentioned are examples of energy-efficient practices that aim to reduce energy consumption while maintaining or improving the level of service.

Sustainable development aims to balance the needs of the present with the needs of future generations, ensuring that resources are used in a way that does not compromise the ability of future generations to meet their own needs.

Resource conservation involves a combination of reducing consumption, reusing materials, and recycling materials to minimize the use of new resources and reduce waste.

Upcycling is the process of transforming waste materials or unwanted products into new materials or objects of better quality or perceived value.

Green technology aims to reduce environmental impact, increase energy efficiency, and lower operating costs, not increase pollution.

Phytoremediation, bioremediation, and constructed wetlands are all natural treatment systems that use plants, microorganisms, and natural processes to remove pollutants from wastewater.

Nuclear energy is not a renewable energy source because it relies on the use of uranium, a finite resource.

Water conservation, water efficiency, and water management all refer to the practice of using less water for the same purpose.

Sustainable agriculture aims to reduce the use of pesticides and other harmful chemicals, not increase their use.

Renewable energy generation, green energy production, and sustainable power generation all refer to the practice of using renewable energy sources to generate electricity.

Energy efficiency aims to reduce energy consumption and lower energy bills, not increase greenhouse gas emissions.

Green building, sustainable architecture, and eco-friendly design all refer to the practice of using natural materials and processes to build and design buildings.

Geothermal energy is not a type of renewable energy because it relies on the heat from the Earth's core, which is a finite resource.

Waste reduction, waste minimization, and source reduction all refer to the practice of reducing the amount of waste produced.