Developed countries are on their way to fulfilling a pledge to provide $100bn a year by 2020 to the developing world to combat climate change, according to a new report from the OECD. Finance flowing from rich to poor countries stood at $62bn in 2014, and averaged out at $57bn annually over the 2013-2014 period, according to the report. 70% of this came from public sources. The report was presented ahead of a meeting of finance ministers in Lima, where donor governments are expected to outline their financial contribution plans, reports Carbon Pulse, which could be key to a deal in Paris later this year. But Climate Home highlights there are still divisions over what exactly constitutes climate finance. Reuters also covered the story.

The world is facing a global coral bleaching event for only the third time in history, marine scientists have warned. A combination of climate change, El Niño and a huge patch of warm water known as “the blob” means that coral reefs could lose their colour on a scale not seen since similar events in 1998 and 2010. The total loss could amount to 5% of the world’s corals in 2015, and the losses could grow if the event continues into 2016, reports the Washington Post. The BBC, the Times, Climate Home, the New York Times and Reuters also cover the story.

On its front page, the Independent carries the story that onshore wind is now the UK’s cheapest source of electricity, based on a new report from Bloomberg New Energy Finance. It says that the fall in price could be a “landmark moment” for renewable energy in Britain — but points out that the government has been resisting onshore turbines. The Guardian also carries the story.

G20 countries should coordinate on carbon pricing policies, beginning at next month’s summit in Turkey, according to a new working paper by the New Climate Economy group of experts. Coordination could help to avoid competitiveness concerns, according to one of the report’s authors. Climate Home reports its findings that all developed countries should adopt a price of $75 per tonne of CO2 by 2030, with a price of $35 per tonne in the developing world.

Rachel Kyte, World Bank vice-president and special envoy for climate change, has said that the UN talks in Paris this December should not put an explicit figure to the amount of finance rich countries should provide to the poor in the future. The $100bn by 2020 already pledged was “picked out of the air at Copenhagen”, and has not been helpful for developing economies, she says. Finance is set to be one of the key debates in Paris.

Up to 10 big oil and gas groups are planning to commit to delivering “secure energy with reduced greenhouse gas intensity” at a meeting of energy executives in Paris next week, attended by the heads of BP, BG Group, Total, Eni, Statoil and Repsol. Shell and Saudi Aramco are also involved in the initiative. They are expected to announce a range of activities, including co-operation on measures to curb flaring of methane gas and the development of carbon capture and storage.

Those who say that the world won’t decarbonise are asking the public to believe in the biggest conspiracy theory yet: that almost all of the world’s major governments are lying. This is the argument of Business Green’s James Murray, who says that such as message is increasingly popular with “fossil fuel companies, investors, analysts, media commentators, certain politicians, some environmentalists, and, inevitably, plenty of climate sceptics”. But it comes at a time when many governments have just submitted action plans to the UN about how they intend to tackle their emissions, he writes.

Climate change could have positive effects on populations of lizards living in high-latitude regions, a new study suggests. Researchers found that higher temperatures result in Swedish sand lizards (Lacerta agilis) laying their eggs earlier, which leads to better fitness and survival in their offspring. However, climate change is likely to affect a whole range of traits, in addition to egg-laying date, which together would have an unknown combined effect on survival and reproductive success, the researchers caution.

Two species of butterfly in Greenland have become smaller in response to increasing temperatures, a new study finds. Researchers measured the wing length of nearly 4500 butterflies collected between 1996 and 2013 in Northeast Greenland. The results showed wing length decreasing in both species (Boloria chariclea and Colias hecla) as summers got warmer. Body size is strongly related to distances butterflies can travel and how well they reproduce, the researchers say, which means these Arctic species could face severe challenges in response to ongoing climate change.