As the clearly finite quantities of non-renewable resources, such as coal, crude oil and natural gas, are reduced further, the question of conserving remaining stocks until alternatives are found will become more pressing. This can be addressed through conservation of energy, or increased production by other means. The latter process does not consider other environmental consequences of increasing production of energy.

See also:

• Waste management
• Recycling
• Thermal depolymerization

• Fossil fuels

• Economics

• Environmentalism
• Greenpeace