An example is Omnagen’s innovative self-powered CO2 converter; a device which converts carbon dioxide, methane and air into useful chemicals, without the need for external energy. This is how the device works.
Carbon dioxide is a very stable molecule, it will react with some minerals to form stable carbonates, but other reactions require energy. Photosynthesis, for example, uses energy from the sun to convert CO2 and water into glucose and oxygen.
CO2 is only a problem if it is in the earth’s atmosphere. The greenhouse effect is explained here.
Carbon Capture and Storage (CCS) involves capturing CO2 from the air, or exhaust gases, liquifying it, and then burying it. This is expensive, but it will allow fossil fuels to be used without releasing carbon dioxide into the atmosphere. More details about CCS.
NOx emissions from diesel engines. These are nitrogen oxides, and are explained here.
SOx emissions. Many fossil fuel deposits contain sulphur compounds. When burnt these produce sulphur dioxide (SO2), which irritates eyes and respiratory tracts, and causes acid rain. This can be removed from exhaust gases, or before the fuel is burnt. SOx emissions also originate from volcanoes.
Particulates are small airborne particles which can be inhaled. The smallest can enter the blood stream. Sources of particulate emissions range from diesel engines, to cigarette smoke, to coal ash, to volcanoes.
VOC emissions. These are Volatile Organic Compounds, and range from methane released from naturally occuring methane-hydrates, to accidental release of a wide range of chemicals. Mix these with NOx emissions and sunlight and you can form photochemical smog.
Climate change matters, and outdated and wasteful chemical processes add significantly to global emissions. The processes have been refined over the years, but many were originally developed over a century ago when energy was cheap and emissions weren’t a consideration. More than a gigatonne of carbon dioxide a year can be saved by using a different approach, by producing clean carbon energy, incorporating the Omnagen Cell. This website provides some information, but do contact Ken Omersa if you'd like to know more; phone and email details are provided here.