( CNN ) -- U.N. Secretary-General Ban Ki-moon urged developed nations to `` lead by example '' Wednesday as a climate change conference bogged down over support for poor nations trying to adapt to a warming world . The two-week conference in Poland 's capital , Warsaw , opened with a hunger strike by the top delegate from the typhoon-battered Philippines to demand concrete action toward a new global pact on climate change . But with two days of talks left , participants said countries remained split on the big issues . `` Next year will require a lot of heavy lifting if we are to remain on track for an agreement in 2015 , '' Ban said Wednesday . He called on countries to put their money where their mouths were by devoting more funding to deal with climate change and the carbon emissions blamed for causing it . `` The developed countries have great capacity and should lead by example , '' Ban said . `` Science is telling us we need to do more . Economists are highlighting the huge cost of inaction . Businesspeople want the signals from government that will create the right incentives to build a low-carbon future , '' he added . The Warsaw conference brings together countries that have signed onto the U.N . Framework Convention on Climate Change to review their progress in limiting global temperature increases . But this year 's meeting has been discouraging for advocates of aggressive action to limit carbon emissions and rein in a projected increase in global average temperatures . Australia 's new conservative government recently announced plans to repeal a carbon tax aimed at reducing greenhouse gas emissions . Japan announced last week it would n't meet its stated emissions targets , citing the replacement of nuclear power plants idled after the 2011 meltdown at Fukushima Daiichi with fossil fuel generation . Canada made a similar announcement in October . A study released Tuesday by researchers at Britain 's East Anglia University found greenhouse gas emissions will top 39 billion tons in 2013 . The rate of increase has slowed , but the improvement is a drop in the bucket by global standards . Polish Environment Minister Marcin Korolec , the Warsaw conference 's president , lost his job in a Cabinet shuffle on Wednesday . But Korolec told delegates that Prime Minister Donald Tusk is keeping him on as president of the conference and as a government official responsible for climate policy . Delegates from developing countries staged a three-hour walkout early Wednesday to protest what Kamrul Haque , a member of Bangladesh 's delegation , called a `` stalemate '' over how to compensate their nations for climate-related losses . Haque said negotiators had gone back into the talks Wednesday night , but added , `` Unless and until everything is agreed , then nothing is agreed . '' But Todd Stern , the head of the U.S. delegation , said the talks ended `` with everybody leaving '' after `` businesslike and productive '' discussions . `` I do n't see this negotiation blowing up over that , '' he said . `` I think we will find a resolution , but we 're still some distance apart . '' An October study in the scientific journal Nature noted that more than 5 billion people live in areas that would be affected by climate change by 2050 , and the countries that will first see its effects are the ones least capable of responding . U.N. members have committed to setting up a $ 100 billion-a-year fund to deal with climate change . But Steve Kretzmann of the U.S.-based environmental group Oil Change International said global subsidies for fossil fuel industries already top $ 500 billion and some estimates run as much as $ 2 trillion . `` There is plenty of money there , '' Kretzmann said . `` It 's just going in the wrong direction for the moment . ''
`` Science is telling us we need to do more , '' Ban Ki-moon tells climate conference . Warsaw conference split between developed and developing nations . Comment: