Despite renewable energy investment more than tripling globally during the current decade compared to the last 10-year period, most of the power delivered to the world's electric grids during the recent decade was from coal. In fact, coal is still the world's largest source of electricity, providing 38% of world electrical generation in 2018, about the same as 1997. The world spent about $2.6 trillion on renewable energy projects during the decade, over three times the amount spent from 2000 to 2009. Solar photovoltaic investments totaled around $1.3 trillion, and onshore and offshore wind investment totaled around $1 trillion. Globally, solar energy capacity increased by 638 gigawatts between 2009 and 2019, while coal-fired capacity increased by 529 gigawatts, wind capacity increased 487 gigawatts, and natural gas capacity increased 436 gigawatts. Last year, $41 billion was invested in coal worldwide.
