In a bid to maintain and promote open markets and reject all protectionist measures and barriers to trade and investment, the world leaders pledged to seek a balanced conclusion to the Doha Development Round in 2010.

In a major breakthrough, the summit of G-8 industrialized nations and five Outreach countries agreed on a consensus document on climate change without fixing any goals for emerging economies for halving emissions of greenhouse gases by 2050.

Earlier, developed and developing nations agreed that global temperatures should not rise more than two Celsius above 1900 levels.

That is the level above which, the UN says, the Earth`s climate system would become dangerously unstable. US President Barack Obama, on Wednesday, said that the G-8 countries would work towards 80 per cent emission cuts by 2050.

UN Secretary General Ban Ki-moon has said the G-8 had not done enough and should also set 2020 targets.

In a pull aside meeting with US President Barack Obama, Prime Minister Manmohan Singh is believed to have conveyed India`s concerns regarding terrorism emanating from Pakistani soil as also the urgent need for reforming international institutions.

PM also had a one-on-one meeting with German Chancellor Angela Merkel. Both the leaders discussed a range of bilateral and international issues.