Despite a near-record drop in power demand due to the pandemic, renewables' share of the electricity mix was up
14 percent compared to the same period last year.
Despite a near-record drop in power demand due to the pandemic, renewables accounted for 1,129 terawatt-hours in January-June, compared with 992 in the first six months of 2019, according to a report by the Ember energy think tank.
Overall, the percentage of power drawn from wind and solar has more than doubled from 4.6 per cent in 2015 - the year of the landmark Paris deal on climate change.
On the other hand, generation from coal - the most polluting fossil fuel - fell 8.3 per cent in the first half of 2020, the analysis showed.
This was despite leading emitter China increasing its share of the global coal fleet slightly.
"From 2015 it's an incredible amount of growth (in solar and wind), but even at 10 per cent it's not completely transformational," Dave Jones, senior electricity analyst at Ember said.
"When we ask is it enough what we are really talking about is, how fast are emissions falling?
"Thirty per cent of fossil fuel emissions globally are just from coal power plants, so coal fired power generation needs to collapse quickly in order to limit climate change," said Jones.
The analysis showed that many major economies - including China, the United States, India, Japan, Brazil and Turkey - now generate at least 10 per cent of their electricity through wind and solar.
Britain and the European Union were singled out for particular praise, deriving 21 and 33 per cent of their power from renewables, respectively.
'Not fast enough'
Under the Paris Agreement, nations committed to limit temperature rises to "well below" two degrees Celsius above pre-industrial levels, mainly through sweeping emissions cuts.
The accord also aims for a safer cap of 1.5C of warming.
To reach this, the United Nations says emissions must fall 7.6 per cent annually this decade.
Jones said that while 30 per cent of coal's decline this year could be attributed to increased wind and solar generation, the rest was likely due to the economic slowdown caused by COVID-19.
"A large part of this is obviously due to the pandemic rather than long term trends and - let's be honest - it's not fast enough if your target is 1.5oC," he said.
A study published last week in Nature Climate Change found that absent a rapid switch away from fossil fuels, the unprecedented fall in emissions due to COVID-19 would do virtually nothing to slow climate change.
The Intergovernmental Panel on Climate Change says that coal use needs to fall 13 per cent every year this decade to keep the 1.5oC goal in play.
China, the world's leading polluter, reduced its coal production just two per cent so far this year despite its economic slowdown caused by the pandemic.
"Where is China's plan to collapse that coal generation by 2030?" said Jones.
"At the moment it doesn't exist."