Better medicine is one reason why human population has increased over the last 200 years. killing or halting the spread of invading germs, such as bacteria and viruses are one of the many things it can help, improving life expectancy.
For many developing countries, agriculture is the main source of income.
Early farmers were able to grow food as a way of living, and a way to support and feed their families, as well as other families. More food is able to accommodate more people. This encourages nutrition witch increases life span.
Population growth is a main reason global energy consumption has increased. We all use energy daily. More people need more energy to live and work.
Another contribution to the global energy consumption is the economic growth. Many company's and factories rely heavy on natural gas. This is due to the demand of many products.
The demand for many things is also a reason why energy consumption has increased. With a higher demand, more people want it, so they are going to continue to use more.
The United States makes up about 4.25% of the worlds population.
The United States used about 17% of the worlds energy in 2017.
Overall, energy and population is increasing. In the future, we can expect the numbers to be much higher since new technology will be launched and more people will want it.