With businesses and nations attempting to reduce their reliance on fossil fuels and mitigate their impact on the environment, many are turning to renewable sources of energy.

Eleven million people worked in renewable energy in 2018, according to recent analysis from the International Renewable Energy Agency (IRENA). This represents an increase of 700,000 compared to 2017, when 10.3 million people worked in the sector.

Here, CNBC’s “Sustainable Energy” takes a look at the top five technologies that employ these clean energy workers, according to IRENA’s Renewable Energy and Jobs Annual Review.

Asia represents a large chunk of the world’s solar heating and cooling jobs, with 711,000 people there employed in the sector last year, according to IRENA.

The organization also estimated that there were 12,100 solar heating and cooling workers in the U.S.

According to the Solar Energy Industries Association (SEIA), solar heating and cooling systems gather the Sun’s thermal energy and use it to, “provide hot water, space heating, cooling and pool heating for residential, commercial and industrial applications.”

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