Global energy consumption is still increasing. The data below shows the increased demand in 2018 over 2017. The units are Mtoe, millions of tonnes of oil equivalent – energy released when burning a million tonnes of oil. 1Toe is approximately 42 gigajoules, in more commonly used units. Data source is the IEA (International Energy Agency).
The two main points are that renewable energy only powered a quarter of that increased demand, and that fossil fuels provided almost all of the rest.
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.