Matching Pairs Hydrocarbon testOnline version Frequently asked questions about hydrocarbons by Adriana Tp 1 Where do fuels come from? 2 How does the hydrocarbon industry take care of the environment? 3 In what forms can hydrocarbons be found? 4 How is the energy contained in natural gas measured? 5 Where is oil found? Interstices between grains of sand that form rocks called "sandstones", which can be of marine, fluvial, glacial or lacustrine origin. All work carried out to search for, produce, transport, refine and sell oil, gas or their derivatives is carried out taking care of the environment. The energy contained in natural gas can be measured using the heating unit of measurement BTU, which stands for British Thermal Unit. Hydrocarbons at normal temperature and pressure can occur in three forms These products are purchased and shipped from refineries to service stations where they can finally be purchased by the public.