On Wednesday the United Nations urged global business leaders to double investment in wind and solar energy to $600bn (£400bn) a year by 2020. The announcement comes one month after the Paris climate agreement, where nearly 200 countries agreed to dramatically cut emissions. This week UN secretary general Ban Ki-moon urged business leaders to act decisively to hasten the transition away from the fossil fuel economy – or they would put the historic accord in jeopardy.

But even if business leaders do reach this ambitious target, it only marks the start of the investment needed to meet the agreed 1.5 degree target. The International Energy Agency has estimated that to hit this taget the world will need to spend more than $16trn (£10.55trn) over the next 15 years, to cover the costs of replacing coal and gas-fired power stations with emissions-free sources of energy such as wind, solar and nuclear as well as the costs for improving existing energy efficiency in homes and businesses.

So who’s going to foot the bill? What can developing countries do to help ensure we reach the 1.5 degree target? How can markets be used to promote private-sector solutions to climate change? And what can be done to create effective alliances to deliver the ambition of the Paris agreement?

Join an expert panel on Thursday 4 February, 1-3pm GMT, to discuss these questions and more.

Panel
George Wamukoya, member of the African Group of Negotiators, Nairobi, Kenya
George was a co-facilitator of some of the elements of the Paris Agreement.

Sam Barnard, research officer, Overseas Development Institute, London, UK @samuelmarch
Sam conducts research on how international finance can best support low-carbon and resilience building investments in developing countries

Brandon Wu, senior policy analyst, ActionAid, Washington DC, USA @brandoncwu
Brandon works on generating climate finance for developing country mitigation/adaptation. Former representative to Green Climate Fund Board.

Virginie Fayolle, senior economist, Acclimatise, London, UK @VirginieFayolle
Virginie focuses on climate adaptation planning. As part of the Seychelles COP21 delegation, she provided advisory support to the Indian Ocean Commission.

Anthony Hobley, CEO, Carbon Tracker Initiative, London, UK @arhobley @CarbonBubble
Anthony has 20 years experience working on the financial market solutions to a climate secure economy. @carbonbubble

Aaron Atteridge, research fellow, Stockholm Environment Institute, Stockholm, Sweden @SEIclimate
Aaron co-leads SEI’s research initiative on the effectiveness of climate finance.

Karen Orenstein, senior analyst, Friends of the Earth US, Washington DC, USA @KarenOrenstein @foe_us
Karen’s work focuses on the provision of funds by developed countries for developing countries to take environmentally-sound, socially-just climate action.

Joe Thwaites, research analyst, World Resources Institute, Washington DC, USA @WRIFinance
Joe researches ways that international climate finance can enable transformative low-emissions, climate-resilient development.

Remco Fischer, programme officer, UNEP Finance Initiative, Geneva, Switzerland @UNEP_FI
Remco oversees projects aimed at helping align the operations of the finance sector with economic development which is ‘low-carbon’ and ‘climate-resilient’.

Tim Ash Vie, head of climate change, Adam Smith International, London, UK @AdamSmithInt
Tim leads the direction and implementation of large donor-funded climate change programmes across Africa and Asia.

The live chat is not video or audio-enabled but will take place in the comments section (below). Get in touch via globaldevpros@theguardian.com or @GuardianGDP on Twitter to recommend someone for our expert panel. Follow the discussion using the hashtag #globaldevlive.