According to the report "Global Trends in Renewable Energy Investment 2019", published by UN Environment ahead of its Climate Action Summit, installed renewable energy capacity (excluding large hydropower) from 2010 to 2019 will have quadrupled from 414 GW at the end of 2009 to just over 1,650 GW when the decade closes at the end of this year.

 During this period, solar power has been the leader among all generation technologies. By the end of 2019, solar power capacity will have grown from 15 GW in early 2010 to a projected 663 GW by the end of 2018.

This report also reveals that renewable energy generated 12.9% of electricity in 2018 up from 11.6% in 2017, which avoided around 2 billion tonnes of carbon dioxide emissions last year.

Renewable energy investment capacity by technology (2010-2019)	Renewable energy investment capacity by country (2010-2019)

The document highlights that China has been the largest investor in renewable energy capacity during this decade, with a balance of $758 billion between 2010 and the first half of 2019. It is followed by the United States, with $356 billion, and Japan, with $202 billion.

Countries in Europe as a whole committed $698 billion to renewables capacity over the same period, with Germany leading the way ($179 billion), followed by the UK ($122 billion).