As you might expect, the global energy market is pretty massive. Estimates suggest that in 2018, global energy investment reached around $1.85 trillion. Other figures estimate that global oil and gas exploration and production is the 8th largest industry in the world by revenue, worth $2.7 trillion in 2021. 

The industry is also expected to keep growing, particularly in some important areas. Data shows that the worldwide renewable energy sector is expected to be worth over $1.5 trillion by 2025,  a compound annual growth rate (CAGR) of 6.1 percent from 2018 to 2025. 

Within this sector, the solar energy industry is projected to reach a value of $223.3 billion by 2026. In that same period, the wind energy industry is expected to be worth $9.1 billion. 

Countries such as China, the US, India and Russia are some of the largest primary energy (taken from natural resources) consumers in the world. China alone accounted for 141.7 exajoules of energy consumption in 2019, compared to 7.84 exajoules in the UK.