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  2. Diving regulator - Wikipedia

    en.wikipedia.org/wiki/Diving_regulator

    A diving regulator or underwater diving regulator is a pressure regulator that controls the pressure of breathing gas for underwater diving.The most commonly recognised application is to reduce pressurized breathing gas to ambient pressure and deliver it to the diver, but there are also other types of gas pressure regulator used for diving applications.

  3. Rebreather - Wikipedia

    en.wikipedia.org/wiki/Rebreather

    The 1953 expedition used closed-circuit oxygen equipment developed by Tom Bourdillon and his father for the first assault team of Bourdillon and Evans; with one "dural" 800l compressed oxygen cylinder and soda lime canister (the second (successful) assault team of Hillary and Tenzing used open-circuit equipment).

  4. Emissions trading - Wikipedia

    en.wikipedia.org/wiki/Emissions_trading

    A coal power plant in Germany. Due to emissions trading, coal may become a less competitive fuel than other options. Emissions trading is a market-oriented approach to controlling pollution by providing economic incentives for reducing the emissions of pollutants. [1]

  5. History of scuba diving - Wikipedia

    en.wikipedia.org/wiki/History_of_scuba_diving

    Scuba diver of the late 1960s. The history of scuba diving is closely linked with the history of the equipment.By the turn of the twentieth century, two basic architectures for underwater breathing apparatus had been pioneered; open-circuit surface supplied equipment where the diver's exhaled gas is vented directly into the water, and closed-circuit breathing apparatus where the diver's carbon ...

  6. Mechanism of diving regulators - Wikipedia

    en.wikipedia.org/wiki/Mechanism_of_diving_regulators

    The mechanism of diving regulators is the arrangement of components and function of gas pressure regulators used in the systems which supply breathing gases for underwater diving. Both free-flow and demand regulators use mechanical feedback of the downstream pressure to control the opening of a valve which controls gas flow from the upstream ...

  7. Emission standard - Wikipedia

    en.wikipedia.org/wiki/Emission_standard

    The government undertook consultation on the model for the standard in April and May 2023, and they intend to introduce legislation by the end of 2023 [80] Research commissioned by environmental NGO Solar Citizens has calculated that a Fuel Efficiency Standard that started at 95g CO2/km and reduced to 0g CO2/km over ten years would save ...