RT Report T1 Natural Selection: Evolving Choices for Alternative Fuels and Vehicle Technologies A1 United Nations Environment Programme, K1 fuel K1 vehicle K1 technology K1 climate change K1 air pollution K1 energy security SN 92-807-243 1-2 YR 2003 FD 2003 LK https://wedocs.unep.org/handle/20.500.11822/30147 UL https://wedocs.unep.org/handle/20.500.11822/30147 NO In the first part, you will find information on different alternative fuels, including descriptions of each alternative fuel technology, current market position, state of development, performance, environmental impact, health and safety concerns, and costs. The second part describes policy options and actions that can be undertaken by governments, industry, and consumers. DS UN Environment Document Repository RD Sep 19, 2026