Clean energy 1 Clean energy metal 1 Commodity prices 1 Costs 1 Crude oil 1 Energy commodity 1 Energy security 1 Environmental regulations 1 Error correction 1 Global threats Global warming 1 High demand 1 Metal prices 1 Metals 1 Natural gas 1 Natural resources 1 Non-energy 1 Renewable energy resources 1 Renewable energy source 1 clean energy metals 1 coal 1 crude oil 1 energy security 1 natural gas 1 renewable energy sources (RES) 1