The EU wants legally binding emissions cuts to be applied to all countries, adopted by 2015 and enforce by 2020, the Guardian reports.
Meanwhile the US wants countries to determine the scope and pace of their own emissions reductions.
The US last month pledged to cut its emissions 26 percent to 28 percent below 2005 levels by 2025. The EU in October set a binding carbon reduction target of at least 40 percent by 2030, compared to a 1990 baseline.
In Lima on Monday, Todd Stern, the special envoy for climate change, told reporters the US will stick to its up to 28 percent emissions reduction pledge, but doesn’t plan to increase the target, Bloomberg reports.
Yesterday at the climate talks, a global consortium including the World Resources Institute released a proposal outlining the key ingredients to reach a global climate agreement in Paris next year. The study, Elements and Ideas for the 2015 Paris Agreement, provides guidance for how to embed these elements into an ambitious, universal global pact.